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feedstock density

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Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290085
EISBN: 978-1-62708-319-5
... density, elastic modulus, rheological behavior, particle size, formulation control, feedstock mixing, and feedstock properties. The chapter also provides information on the processes involved in feedstock preparation and testing. elastic modulus feedstock density feedstock mixing mixture...
Image
Published: 30 April 2020
Fig. 5.10 Conceptual outline of how water immersion is used to measure feedstock density. A sequence of dry and wet mass determinations is used to measure the sample volume, and the sample mass divided by that volume gives the feedstock density. More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290111
EISBN: 978-1-62708-319-5
...-saturated pores. The binder content is low and the solids content high, so little change occurs in feedstock density during forming, even with high pressures. Extrusion is used to form discrete objects by chopping the product to the desired length. Applications for extrusion are found in the fabrication...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290261
EISBN: 978-1-62708-319-5
... and Si3N4) and for brittle materials that require full density (WC-Co, for example). pressure control. The nal phase of molding, where the gate is not frozen and the quantity of feedstock in the die cavity is controlled by the pressure, thereby ensuring uniform weight and dimensions in the nal component...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.9781627083195
EISBN: 978-1-62708-319-5
Image
Published: 01 June 2016
Fig. 5.17 (a) Scanning electron micrograph of the copper feedstock powder. (b) Transmission electron micrograph from powders showing a high dislocation density of 10 12 /cm 2 . (c) Transmission electron micrograph of the cold-sprayed coating, showing the triple point of three particles More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000039
EISBN: 978-1-62708-312-6
... thermoplastic polymer, and palletized to form the feedstock. The latter is available from major chemical companies. The metal powder must be of small particle size to accomplish sintering to nearly full density. High packing densities are also desirable, to minimize the amount of binder necessary to fill all...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460173
EISBN: 978-1-62708-285-3
... resulted in both improved deposition efficiency and higher coating density ( Ref 6.1 ). Particle size distribution affects the cold spray process the most. On one hand, a high content of very fine powders below 5 to 10 μm decreases the deposition efficiency (DE), increases the coating porosity...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290201
EISBN: 978-1-62708-319-5
... are gas or water atomized. Oxygen is higher when the molten metal is atomized by using high-pressure water. The less spherical water-atomized powder starts at a lower packing density. The difference in particle shape reduces solids loading in the feedstock from 62.5 vol% for gas-atomized powder to 55 vol...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290251
EISBN: 978-1-62708-319-5
... is rotated slowly with external heating. Over time, the pellets partially melt, stick to the walls, and form a large, hollow structure on cooling. Similar ideas are applied to powder-binder mixtures, where slow rotation is required. The higher density of powder-binder feedstock requires slow rotation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290035
EISBN: 978-1-62708-319-5
... to formulate a binder. 3.1 Introduction This chapter covers binder ingredients. Combinations of binder ingredients are mixed with powder to form feedstock customized for use in various shaping processes. This is the situation for slurry and hard tooling approaches, including injection molding, extrusion...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290001
EISBN: 978-1-62708-319-5
... of feedstock and describing the challenges in component production. The chapter also summarizes alphabetically a few key concepts in powder-binder processing. binders feedstock polymers powder-binder fabrication The idea of working powders into a target shape followed by sintering emerged more...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460185
EISBN: 978-1-62708-285-3
... fractions (19.5, 36.8, and 57.6 vol%) were mechanically blended and used as initial powder feedstock for coating deposition. The deposits had 30 to 40% lower QC phase than the starting powder, and it was observed that the density and hardness of deposits increased with increasing volume fraction of the QC...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290067
EISBN: 978-1-62708-319-5
... Abstract This chapter provides details on several specific binder formulations and a discussion of basic binder design concepts. The focus is on customization of the feedstock response to heating, pressurization, or solvent exposure for a specific shaping process. The discussion starts...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120047
EISBN: 978-1-62708-269-3
... are the sources of feedstock in powder making. One of the other important features of P/M processing is the potential for developing unique, nonstandard chemistries that may not be able to be processed by any other techniques. Rapid solidification processing has been investigated for nearly two decades...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2022
DOI: 10.31399/asm.tb.tstap.t56040020
EISBN: 978-1-62708-428-4
... is suitable for the deposition of oxygen- and temperature-sensitive materials and can produce thick coatings exhibiting wrought-like microstructures with near theoretical density. Cold spray is being used in the military and in aerospace and energy industry applications. The main research priorities...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460017
EISBN: 978-1-62708-285-3
... line, a fluidized powder feedstock is fed into the gas stream. The powder is accelerated by the expanding gas and impacts the substrate at high velocities of up to 1200 m/s (4000 ft/s) ( Ref 2.7 , 2.23 – 2.26 ). The gas velocities are determined by the gas type, the gas temperature, and the expansion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460209
EISBN: 978-1-62708-285-3
... up to bulk scale with advanced mechanical properties (e.g., high density, high strength, high hardness) and without oxidation, phase transformation, or decomposition of feedstock materials, there have been a number of studies on the application of the cold spray process to various industrial fields...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000223
EISBN: 978-1-62708-312-6
... operating sintering furnace. required for initiating a chemical reaction or physical process such as diffusion or plastic aperture size. The opening of a mesh, as in a flow. sieve. activator. The additive used in activated sinter- apparent density. The weight of a unit volume ing, also called a dopant...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460121
EISBN: 978-1-62708-285-3
... powders enables an understanding of the starting powder structure. Borchers et al. ( Ref 5.44 ) reported a TEM study of cold-sprayed copper (using nitrogen gas) to assess the bonding mechanism of these coatings. An analysis of the feedstock powder revealed that the particles had a dislocation density...