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gold coatings

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Published: 01 January 2002
Fig. 20 Affect of accelerating voltage on imaging. Sample is gold-coated ZnS powders imaged using (a) 25 kV and (b) 5 kV. Note enhanced surface information at 5 kV. Both 20,000× More
Image
Published: 15 December 2019
Fig. 4 Scanning tunneling microscope images of evaporated C 60 film on gold-coated freshly cleaved mica using a mechanically sheared platinum-iridium (80/20) tip in constant-height mode. Source: Ref 125 . © IOP Publishing. Reproduced with permission. All rights reserved More
Image
Published: 15 January 2021
Fig. 20 Effect of accelerating voltage on imaging. Sample is gold-coated ZnS powders imaged using (a) 25 and (b) 5 kV. Note enhanced surface information at 5 kV. Original magnification of both: 20,000× More
Image
Published: 15 May 2022
Fig. 10 Gold coating damage in a Pebax catheter tip containing tungsten particles for opacity. (a) Without charging prior to damage. Original magnification: 4300×. (b) With charging after damage due to aging, appearing as light streaks. Original magnification: 5000× More
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
... information on gold coatings and iridium oxide coatings for stents. biomedical applications dentistry direct gold dental filling materials direct silver dental filling materials gallium alloys gold gold coatings high-copper amalgam alloys iridium iridium oxide coatings mechanical properties...
Image
Published: 01 December 2004
Fig. 18 Degradation of an electronic circuit due to silver diffusion and whisker formation during storage for 3000 h at 270 °C (520 °F). (a) Secondary electron image showing a general view of the transistor with gold-coated silver pads and gold wires. 20×. (b) X-ray dot map (silver More
Image
Published: 01 December 2004
Fig. 14 Improvement of image quality by coating. (a) Secondary electron image of a depression in a gold-coated semiconductor layer (AsSe) showing the cavity wall and protuberances. (b) Same specimen and imaging conditions as (a) but uncoated. Both 15× More
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Published: 01 December 2004
Fig. 33 83.5WC-10.5(Ta,Ti,Nb)C-6Co alloy, 92 HRA. This cobalt-enriched alloy is coated with chemical-vapor-deposited TiN/TiCN and physical-vapor-deposited TiN (gold coating on top) layers. Murakami's reagent, 1 min. 1500×. More
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Published: 01 January 2006
Fig. 4 Scanning electron micrograph of akaganéite on an archaeological iron fragment (gold coated). 600×; picture width, 190 μm. Adapted from Ref 74 More
Image
Published: 01 December 2004
Fig. 16 Comparison of (a) the microstructure of an AISI 1060 steel bar and (b) the microstructure representing a gold-coated acetate replica of the same bar. (a) Etched in 4% picral. Original magnification 200× More
Image
Published: 01 December 2004
Fig. 17 Comparison between (a) the actual microstructure of a seam weld in an API X70 linepipe and (b) the microstructure of a gold-coated replica of the same area. (a) Etched in 2% nital. Original magnification 9× More
Image
Published: 01 December 2004
Fig. 18 Comparison between (a) the actual microstructure of a seam weld in an API X70 linepipe and (b) the microstructure representing a gold-coated replica of the same area. Different region of the weld shown in Fig. 17 . Original magnification 100× More
Image
Published: 15 May 2022
Fig. 6 SEM images from gold-sputter-coated polyvinyl chloride fractured by impact at room temperature, showing brittle fracture. (a) Secondary electron image. Original magnification 500×. (b) Backscattered electron image. Original magnification 500× More
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001266
EISBN: 978-1-62708-170-2
... include the following: Uniform, thin gold films can be deposited over electrically isolated tracks and bonding pads. Gold can be uniformly deposited on complex shaped and hollow articles, provided there is adequate agitation of the solution and/or the articles to be coated. Gold can...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004129
EISBN: 978-1-62708-184-9
... 1968 edition of Metal Finishing , various chemical etchants were evaluated for controlling the undercutting problems of nickel/gold coatings on copper for PCB manufacture ( Ref 11 ). Control of the undercutting was essential to prevent trapping of the etchant residues on the PCB. Fig. 1 Example...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001460
EISBN: 978-1-62708-173-3
... applications. Lead-Indium Alloys Lead-indium alloys are used when soldering to precious-metal (gold, silver, platinum, palladium, or their alloys) substrates or coatings and when attaching components to hybrid thick-film networks. These solders have a lower rate of metal dissolution (and subsequent...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006395
EISBN: 978-1-62708-192-4
... chromium, electroplated nickel, electroless (autocatalytic) nickel, electroless nickel composite coatings, electroplated gold, and platinum group coatings. These are specifically tailored toward plated coatings for friction, lubrication, and wear technology. The article concludes with a discussion...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003687
EISBN: 978-1-62708-182-5
... of Coatings The principal metals that are widely plated are cadmium, zinc and its alloys, chromium, copper, gold, nickel, tin, and silver. Other metals that are plated by in-house shops and some job platers are cobalt, indium, iron, lead, palladium, platinum, rhenium, and rhodium. Plateable alloys add...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004175
EISBN: 978-1-62708-184-9
... severe if the anodic surface is small compared with that of the more noble cathode, or in cases where a more noble metal is coated onto a less noble one. For instance, when porous gold plating over a nickel substrate is exposed to a corrosive environment, the gold coating acts as a large cathode relative...
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
... wrapping present no serious problems. The sliding and wear behavior of palladium are similar to those of hard gold. Palladium coatings may be slightly less porous than gold coatings, and they resist tarnish and corrosion. On the other hand, the chemical properties of palladium are quite different from...