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Book: Surface Engineering
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001254
EISBN: 978-1-62708-170-2
... Abstract The electroplating of platinum-group metals (PGMs) from aqueous electrolytes for engineering applications is limited principally to palladium and, to a lesser extent, to platinum, rhodium, and thin layers of ruthenium. This article provides a discussion on the plating operations of...
Abstract
The electroplating of platinum-group metals (PGMs) from aqueous electrolytes for engineering applications is limited principally to palladium and, to a lesser extent, to platinum, rhodium, and thin layers of ruthenium. This article provides a discussion on the plating operations of these PGMs along with the types of anodes used in the process.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003150
EISBN: 978-1-62708-199-3
... Abstract Precious metals include gold, silver, and six platinum-group metals, namely, platinum, palladium, ruthenium, rhodium, osmium, and iridium. This article focuses on the consumption, trade practices, properties, product forms, and applications of these metals and their alloys. gold...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005670
EISBN: 978-1-62708-198-6
... Abstract This article focuses on the use of noble and precious metals for biomedical applications. The noble metals include gold, platinum, palladium, ruthenium, rhodium, iridium, and osmium. The physical and mechanical properties of the noble and precious metals are presented in tables. A...
Abstract
This article focuses on the use of noble and precious metals for biomedical applications. The noble metals include gold, platinum, palladium, ruthenium, rhodium, iridium, and osmium. The physical and mechanical properties of the noble and precious metals are presented in tables. A brief discussion on the ancient history of noble and precious metal use in dentistry is provided. The article discusses the use of direct gold dental filling materials, direct silver dental filling materials, traditional amalgam alloys, high-copper amalgam alloys, and gallium alloys in biomedical applications. Modern stents were developed as a result of balloon catheterization research. The article describes gold coatings and iridium oxide coatings for stents.
Book: Corrosion: Materials
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003829
EISBN: 978-1-62708-183-2
... Abstract This article characterizes the corrosion resistance of precious metals, namely, ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, and gold. It provides a discussion on the general fabricability; atomic, structural, physical, and mechanical properties; oxidation and...
Abstract
This article characterizes the corrosion resistance of precious metals, namely, ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, and gold. It provides a discussion on the general fabricability; atomic, structural, physical, and mechanical properties; oxidation and corrosion resistance; and corrosion applications of these precious metals. The article also tabulates the corrosion rates of these precious metals in corrosive environment, namely, acids, salts, and halogens.
Book: Surface Engineering
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001267
EISBN: 978-1-62708-170-2
... activation of copper for subsequent electroless nickel plating in printed circuit board applications. The addition of ruthenium reduces the number of palladium atoms on the surface and improves the adhesion of the nickel to the copper. The electroless alloy coatings discussed in this article are produced...
Abstract
Metallic nonelectrolytic alloy coatings produced from aqueous solutions are commercially used in several industries, including electronics, aerospace, medical, oil and gas production, chemical processing, and automotive. Nonelectrolytic coating systems use two types of reactions to deposit metal onto a part: electroless and displacement. This article explains the various types of electroless and dispersion alloy coating systems. It provides information on the processing of parts, process control, deposit analysis, and equipment used for coating nonelectrolytic displacement alloys. The article concludes with a discussion on the safety and environmental concerns associated with nonelectrolytic deposition processes.
Book: Corrosion: Materials
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003822
EISBN: 978-1-62708-183-2
... titanium surfaces. The titanium-palladium (Ti-Pd), titanium-ruthenium (Ti-Ru), and grade 12 alloys appear to be much more resistant to this form of localized attack. Fig. 5 Smeared surface iron pitting of unalloyed titanium tubing in hot brine service. Source: Ref 22 Several highly effective...
Abstract
Titanium alloys are often used in highly corrosive environments because they are better suited than most other materials. The excellent corrosion resistance is the result of naturally occurring surface oxide films that are stable, uniform, and adherent. This article offers explanations and insights on the most common forms of corrosion observed with titanium alloys, including general corrosion, crevice corrosion, anodic pitting, hydrogen damage, stress-corrosion cracking, galvanic corrosion, corrosion fatigue, and erosion-corrosion. It also provides practical strategies for expanding the useful application range for titanium and includes a comprehensive overview of available corrosion data.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003142
EISBN: 978-1-62708-199-3
... work has been the development of Ti-0.2Pd, which has considerably greater resistance to corrosion in reducing environments than does unalloyed titanium (ruthenium additions have been found to have the same effect). In addition, work on alloying for thermodynamic stability has resulted in Ti-2Ni, which...
Abstract
This article discusses corrosion resistance of titanium and titanium alloys to different types of corrosion, including galvanic corrosion, crevice corrosion, stress-corrosion cracking (SCC), erosion-corrosion, cavitation, hot salt corrosion, accelerated crack propagation, and solid and liquid metal embrittlement. A short section discusses the addition of alloys that can improve the corrosion resistance of titanium.
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006684
EISBN: 978-1-62708-213-6
... viewed in cross-polarized light using a microscope with a Foster prism and a sensitive tint plate. Note the change in direction of the mechanical twins at the grain boundary. Fig. 17 Microstructure of as-polished pure ruthenium (99.95%) specimen viewed in polarized light: (a) as-cast structure...
Abstract
The reflected light microscope is the most commonly used tool to study the microstructure of metals, composites, ceramics, minerals, and polymers. For the study of the microstructure of metals and alloys, light microscopy is employed in the reflected-light mode using either bright-field illumination, dark-field illumination, polarized light illumination, or differential interference contract, generally by the Nomarski technique. This article concentrates on how to reveal microstructure properly to enable the proper identification of the phases and constituents and, if needed, measuring the amount, size, and spacing of constituents, using the light optical microscope. The discussion covers the examination of microstructures using different illumination methods and includes a comparison between light optical images and scanning electron microscopy images of microstructure.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003222
EISBN: 978-1-62708-199-3
... Platinum 75 150 Palladium 250 450 Rhodium 8 12 Iridium 1 3 Ruthenium 71 100 Osmium 1 (a) 1 (a) All osmium is included in this number. Source: U.S. Bureau of Mines Many of the techniques discussed for processing precious metals recycled from electronics...
Abstract
This article focuses on the recycling of metals including iron and steel, stainless steel, superalloys, nickel, aluminum, copper, precious metals, lead, magnesium, tin, titanium, and zinc. It provides information on the identification and sorting of scrap metals and discusses the equipment and procedures used for small-scale and large-scale scrapping operations.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003062
EISBN: 978-1-62708-200-6
... interface on YSZ has been shown to increase power density over a simple YSZ electrolyte for thin film cells ( Ref 12 ). Ruthenium/YSZ cermet anodes for tubular cells are reported to exhibit reduced anode polarization during use, presumably due to the finer structure present compared to conventional YSZ...
Abstract
Ceramic materials serve important insulative, capacitive, conductive, resistive, sensor, electrooptic, and magnetic functions in a wide variety of electrical and electronic circuitry. This article focuses on various applications of advanced ceramics in both electric power and electronics industry, namely, dielectric, piezoelectric, ferroelectric, sensing, magnetic and superconducting devices.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003181
EISBN: 978-1-62708-199-3
... be cold worked, and iridium can be cold worked with difficulty, only after a fibrous structure has been imparted by careful hot working. Ruthenium and osmium have a hcp structure. Osmium is completely unworkable and ruthenium very nearly so. In general, the only problems special to working of...
Abstract
This article provides a detailed account on forming operations (blanking, piercing, press-brake forming, contour rolling, deep drawing, cold forming, and hot forming) of various nonferrous metals, including aluminum alloys, beryllium, copper and its alloys, magnesium alloys, nickel alloys, titanium alloys, and platinum metals. It discusses the formability, equipment and tooling, and lubricants used in the forming operations of these nonferrous metals.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003086
EISBN: 978-1-62708-199-3
... chemical behavior (will react with acids). But as stated above, because of the chemical activities of the metallic elements, thin oxides rapidly form on freshly bare surfaces of most metals. Ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, and gold are the exceptions. These eight metals...
Abstract
Material properties are the link between the basic structure and composition of the material and the service performance of a part or component. This article describes the most significant properties that must be considered when choosing a metal for a given application, namely physical properties (mass characteristics and thermal, electrical, magnetic, radiation, and optical properties), chemical properties (corrosion and oxidation resistance) and mechanical properties (tensile and yield strength, elongation, toughness, hardness, creep, and fatigue). The article also contains tables that list room-temperature physical properties, vapor pressures, and mechanical properties for various metals.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003082
EISBN: 978-1-62708-199-3
... Lithium 0.534 0.019 Manganese 7.43 0.270 Mercury 13.546 0.489 Molybdenum 10.22 0.369 Niobium 8.57 0.310 Osmium 22.583 0.816 Plutonium 19.84 0.717 Potassium 0.86 0.031 Rhenium 21.04 0.756 Rhodium 12.44 0.447 Ruthenium 12.2 0.441 Selenium 4.79 0.174...
Abstract
This article contains tables that present engineering data for the following metals and their alloys: aluminum, copper, iron, lead, magnesium, nickel, tin, titanium, zinc, precious metals, permanent magnet materials, pure metals, rare earth metals, and actinide metals. Data presented include density, linear thermal expansion, thermal conductivity, electrical conductivity, resistivity, and approximate melting temperature. The tables also present approximate equivalent hardness numbers for austenitic steels, nonaustenitic steels, austenitic stainless steel sheet, wrought aluminum products, wrought copper, and cartridge brass. The article lists conversion factors classified according to the quantity/property of interest.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003244
EISBN: 978-1-62708-199-3
... cementite plates of pearlite may simply be bent adjacent to some scratches and may be completely fragmented adjacent to others. Austenitic steels generally are quite susceptible to abrasion artifacts, and the common etchants reveal effects due to prior deformation with considerable sensitivity. The...
Abstract
This article describes the methods and equipments involved in the preparation of specimens for examination by light optical microscopy, scanning electron microscopy, electron microprobe analysis for microindentation hardness testing, and for quantification of microstructural parameters, either manually or by the use of image analyzers. Preparation of metallographic specimens generally requires five major operations: sectioning, mounting, grinding, chemical polishing, and etching. The article provides information on the principles of technique selection in mechanical polishing, and describes the procedures, advantages, and disadvantages of electrolytic and chemical polishing. It also provides a detailed account of procedures, precautions, and composition for preparation and handling of etchants.
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005337
EISBN: 978-1-62708-187-0
...-solution strengtheners of the alpha phase. Alloying elements to improve corrosion resistance include nickel, molybdenum, palladium, and ruthenium. Additionally, silicon is added to titanium alloys to improve creep resistance in amounts ranging from 0.08 to 0.45 wt%. More detailed information of the...
Abstract
The combination of high strength-to-weight ratio, excellent mechanical properties, and corrosion resistance makes titanium the best material choice for many critical applications. This article begins with a description of the historical perspective of titanium casting technology. It discusses the types of molding methods, such as rammed graphite molding and lost-wax investment molding. The article provides information on the casting design, melting, postcasting, and pouring practices. It describes the microstructure and mechanical properties of Ti-6AI-4V alloy. The article examines the product applications of titanium alloy castings. The tensile properties, standard industry specifications, and chemical compositions of various titanium alloy castings are tabulated.
Book: Corrosion: Materials
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003828
EISBN: 978-1-62708-183-2
... in corrosion resistance. Chromium protected uranium in boiling water, but protection was lost in chloride solutions. Bismuth and tin additions formed pyrophoric phases. Cerium, rhodium, and ruthenium increased the corrosion rate. Some elements showed synergistic effects (e.g., U-Nb-Zr), but their...
Abstract
This article reviews general corrosion of uranium and its alloys under atmospheric and aqueous exposure as well as with gaseous environments. It describes the dependence of uranium and uranium alloy corrosion on microstructure, alloying, solution chemistry, and temperature as well as galvanic interactions between uranium, its alloys, and other metals. The article provides information on the atmospheric corrosion of uranium based on oxidation in dry air or oxygen, water vapor, and oxygen-water vapor mixtures depending upon particular storage conditions. The mechanism and morphology of hydride corrosion of uranium are discussed. The article provides information on environmentally assisted cracking, protective coatings, and surface modification of uranium and its alloys. It also summarizes the environmental, safety, and health considerations for their use.
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006679
EISBN: 978-1-62708-213-6
...+ ⇄ Pu 3+ 1 M HClO 4 or, to avoid iron interference, 5.5 M HCl, 0.015 M sulfamic acid, NaH 2 PO 4 Rhodium Hg Rh 3+ → Rh(Hg) 0.2 M HCl Ruthenium Pt Ru 4+ → Ru 3+ 5 M HCl Silver Pt Ag + → Ag(s) 0.1 M H 2 SO 4 Technetium Hg Tc 7+ → Tc 3+ Acetate...
Abstract
This article describes various methods of electrochemical analysis, namely coulometry, electrogravimetry, voltammetry, electrometric titration, and nanometer electrochemistry. The discussion covers the general uses, sample requirements, application examples, advantages, and limitations of these methods. Some of the factors pertinent to electrochemical cells are also provided. In addition, the article provides information on various potentiometric membrane electrodes used to quantify numerous ionic and nonionic species.
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005955
EISBN: 978-1-62708-166-5
... 3900 2357 4274 … … Rubidium 88 190 123 253 165 329 217 423 679 1254 Ruthenium 2058 3736 2230 4046 2431 4408 2666 4831 … … Tantalum 2599 4710 2820 5108 … … … … … … Thallium 461 862 500 932 606 1123 660 1220 1457 2655 Thorium 1831 3328 2000...
Abstract
Vacuum heat treating consists of thermally treating metals and alloys in cylindrical steel chambers that have been pumped down to less than normal atmospheric pressure. This article provides a detailed account of the operations and designs of vacuum furnaces, discussing their pressure levels, resistance heating elements, quenching systems, work load support, pumping systems, and temperature control systems. It describes the classification of instruments used for measuring and recording pressure inside a vacuum processing chamber. Common devices include hydrostatic measuring devices and devices for measuring thermal and electrical conductivity. The article also describes the applications of the vacuum heat treating process, namely, vacuum nitriding and vacuum carburizing. Finally, it reviews the heat treating process of tool steels, stainless steels, Inconel 718, and titanium and its alloys.
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006785
EISBN: 978-1-62708-295-2
... water contained caustic soda (NaOH) or the boiler water chemistry was conducive to the formation of caustic soda ( Ref 4 ). In their 1926 paper, “The Cause and Prevention of Embrittlement of Boiler Plate,” researchers at the University of Illinois Engineering Experiment Station concluded, “The results...
Abstract
Stress-corrosion cracking (SCC) is a form of corrosion and produces wastage in that the stress-corrosion cracks penetrate the cross-sectional thickness of a component over time and deteriorate its mechanical strength. Although there are factors common among the different forms of environmentally induced cracking, this article deals only with SCC of metallic components. It begins by presenting terminology and background of SCC. Then, the general characteristics of SCC and the development of conditions for SCC as well as the stages of SCC are covered. The article provides a brief overview of proposed SCC propagation mechanisms. It discusses the processes involved in diagnosing SCC and the prevention and mitigation of SCC. Several engineering alloys are discussed with respect to their susceptibility to SCC. This includes a description of some of the environmental and metallurgical conditions commonly associated with the development of SCC, although not all, and numerous case studies.
Book: Corrosion: Materials
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003837
EISBN: 978-1-62708-183-2
... (IC-221) 2.5 0.08 Nickel aluminide (IC-218) 2.9 0.09 Nickel aluminide (IC-50) 4.1 0.1 Nickel aluminide (IC-50, plasma weld overlay) 7.0 0.2 Stellite 21 (stick) 7.3 0.2 Iron aluminide 11.6 0.4 Nitronic 60 bar stock 12.8 0.4 Aluminum oxide ceramic plate 18.4 0.6...
Abstract
This article reviews the corrosion behavior of intermetallics for the modeling of the corrosion processes and for devising a strategy to create corrosion protective systems through alloy and coating design. It discusses the high-temperature corrosion properties of intermetallics and aqueous corrosion properties. Thermodynamic principles in the context of high-temperature corrosion and information on oxidation; sulfidation; hot corrosion of NiAl-, FeAl-, and TiAl-based intermetallics; and silicides are included. The article explores the thermodynamic consideration, ordering influencing kinetics, stress-cracking corrosion, and hydrogen embrittlement of aqueous corrosion. It also explains the practical issues dealing with the corrosion problems.