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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001674
EISBN: 978-1-62708-234-1
... Abstract Accelerated aging tests on detonator assemblies, to verify the compatibility of gold bridgewire and Pd-In-Sn solder with the intended explosives, revealed an unusual form of corrosion. The tests, conducted at 74 deg C (165 deg F) and 54 deg C (130 deg F), indicated a preferential...
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Published: 01 June 2019
Fig. 1 Electroless nickel underplating and gold plating on a copper alloy CDA175 module retaining clip. (a) shows a good plated clip and (b) shows a bad clip with copper oxide (black layer) at the copper/alloy nickel plating interface, where the separation occurred. More
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Published: 01 December 2019
Fig. 5 A micrograph of the fracture surface (gold coated) of Fig. 4 revealing multiple crack origins, a smooth morphology, and arrest marks More
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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
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001021
EISBN: 978-1-62708-214-3
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0006440
EISBN: 978-1-62708-234-1
... microscopy. The corrosion product contained molybdenum and copper with a trace of gold. The base material was analyzed as molybdenum with negligible alloying additions. The primary mode of corrosion attack on the base material appeared to be intergranular, although uniform corrosion was evident also...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047756
EISBN: 978-1-62708-235-8
... extremities of a granular gold-tinted surface region adjacent to the tube-to-sleeve brazed joint and extending circumferentially were revealed by microscopic examination. Embrittlement of the tube caused by molten braze metal penetration along grain boundaries was evidenced by micrographs of a granular...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001494
EISBN: 978-1-62708-235-8
... Abstract Diode leads that were to be made from OFHC copper were instead made from copper with high oxygen content. The leads had a nickel underplating, a gold final plating, and were brazed to the diode package in a hydrogen atmosphere. After brazing, the leads became embrittled. SEM...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001492
EISBN: 978-1-62708-235-8
... thick gold plating. When the printed circuit board modules were inserted in the clips, shear and/or tensile stresses were generated at the copper base alloy/nickel plating and nickel/gold plating interfaces, depending on the location of the clip. The clips with plating failures and some good clips were...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001391
EISBN: 978-1-62708-215-0
... Electronic devices Gold Lead-tin Polymer (Other, miscellaneous, or unspecified) failure Background Several surface-mount chip resistor assemblies failed during monthly thermal shock testing and in the field. Circumstances Leading to Failure The resistor, the only electrically active...
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Published: 01 December 1993
Fig. 8 Energy dispersive spectra showing titanium and nitrogen on the surface. Sample after gold sputter coating. 500×. More
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Published: 01 June 2019
Fig. 6 EDS chemical analysis of the black foam insulation reveals a high level of chlorine. Sample is sputter-coated with gold. More
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Published: 30 August 2021
Fig. 24 Simplified daisy chain circuit. PCB, printed circuit board; NSMD, nonsolder mask defined; ENIG, electroless nickel and immersion gold More
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Published: 01 June 2019
Fig. 2 Cross-section of an OFHC copper diode lead with nickel underplating and gold plating. Plating cracked due to excessive back and forth bending of the lead, exposing the copper to oxidize, causing lead separation. More
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Published: 01 December 1993
Fig. 3 Delaminated group 8 resistor that exhibited a low pushoff strength. Note the puckered appearance of the gold polymer coating at the left termination. This was caused by the heat of soldering exceeding the T g of the epoxy. 21.6× More
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001381
EISBN: 978-1-62708-215-0
..., and the nut were gold colored. The fracture surfaces were first cleaned with soap and water and were then ultrasonically cleaned to remove surface debris. Longitudinal and transverse sections were prepared for optical microscopy. The bolt surface was also inspected for identification of coatings and surface...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001767
EISBN: 978-1-62708-241-9
... Fig. 5 A micrograph of the fracture surface (gold coated) of Fig. 4 revealing multiple crack origins, a smooth morphology, and arrest marks Fig. 6 A micrograph of the exterior bracket surface adjacent to the fracture revealed a strong degree of crack formation. Fig. 7...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001667
EISBN: 978-1-62708-235-8
... Laboratory Procedures Examination of replicas by standard optical microscopy or scanning electron microscopy (SEM) techniques requires that a thin layer of metal, usually gold, be deposited on the surface of the replica. In this case, the replicas were placed at an acute angle with respect to the gold...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003533
EISBN: 978-1-62708-180-1
... filament SEM to (b) field emission instrument. Samples imaged at 10,000× 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× Fig. 21 Examination of a surface...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006769
EISBN: 978-1-62708-295-2
... flexibility. Evaporation methods are very easy and reliable, provided a clean vacuum chamber is maintained, because degradation of the vacuum can cause the quality of the coatings to suffer. Typical metals used for coating are gold and platinum, with finer-grained coatings being produced...