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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001798
EISBN: 978-1-62708-241-9
... Carbon and oxygen contents of epoxy resin encapsulants Table 2 Carbon and oxygen contents of epoxy resin encapsulants Specimen C (wt.%) O (wt.%) C/O Normal 71.97 28.03 2.57 Softened 70.52 29.48 2.39 Fluid 70.27 29.73 2.36 Typical parameters in three TGA curves...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048498
EISBN: 978-1-62708-234-1
... Abstract A graphite-epoxy tapered-box structure, which consisted of two honeycomb skin panels fastened to a spanwise spar with intermediate chordwise ribs, fractured during testing. Hinge-line deflection of the front spar was revealed. Through-thickness cracks in the forward and trailing edges...
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Published: 01 June 2019
Fig. 3 Corrosion pitting and cracking appeared under the green (G) epoxy primer and gray paint (P) near the start of fracture of Fig. 2 . Magnification 420 times. More
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Published: 01 December 2019
Fig. 1 Curing mechanism of epoxy resin with anhydride as curing agent More
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Published: 01 December 2019
Fig. 2 Fault tree for failure of epoxy resin encapsulant More
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Published: 01 December 2019
Fig. 3 FTIR spectra of epoxy resin encapsulants ( a ) The whole spectra ( b ) Magnified spectra of carbonyl group More
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Published: 01 December 2019
Fig. 4 EDS spectra of epoxy resin encapsulants More
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Published: 01 December 2019
Fig. 5 TGA curves of epoxy resin encapsulants More
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Published: 01 December 2019
Fig. 6 DSC curves of epoxy resin encapsulants More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0045926
EISBN: 978-1-62708-235-8
... Abstract A batch of bimetal foil/epoxy laminates was rejected because of poor peel strength. The laminates were manufactured by sintering a nickel/phosphorus powder layer to a copper foil, cleaning, then chromate conversion coating the nickel-phosphorus surface, and laminating the nickel...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001059
EISBN: 978-1-62708-214-3
... atmosphere and concentrating under the insulation around the support rings. A complete insulation evaluation, including repair or replacement, was recommended to prevent chloride buildup. Painting of the steel surface with an epoxy-phenolic or epoxy-coal tar was also suggested. Selected Reference...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001765
EISBN: 978-1-62708-241-9
... in the failure analysis. The corrosion products were analyzed using energy-dispersive X-ray analysis (EDAX). The failure is attributed to the ingress of water and its impoundment under the tank bottom along the periphery inside the ring wall and failure of water side epoxy coating. Various measures to prevent...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001493
EISBN: 978-1-62708-235-8
... between the epoxy board and copper caused the thin plating to crack. During electrical testing of a four-layer circuit board, an open electrical circuit was found between the plated through-holes. Plating discontinuity was caused by poor drilling using a dull drill with improper speed (rpm) and/or feed...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001656
EISBN: 978-1-62708-219-8
... to sinusoidal load fluctuations at 6.7 Hz in air, 3% NaCl solution, and natural sea water are described. Reinforcement types studied included: hot-rolled mild steel bar, hot-rolled alloyed high strength bar, cold-worked high strength bar, galvanized bar of all these three types, nickel-clad bar and epoxy-coated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0045903
EISBN: 978-1-62708-223-5
... in.) from the origin along the wall of a hydraulic-oil bleed hole. Investigation with a SEM showed corrosion pits along the bleed hole wall, but oxidation and corrosion prevented review of microfractographic details. Vacuum epoxy encapsulation, sectioning of the bleed hole, and metallographic examination...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c0091598
EISBN: 978-1-62708-218-1
... concentrated ammonium nitrate solution. Recommendations included the cost-effective solution of applying a three-coat epoxy-type coating with a total dry thickness of 0.3 mm (0.013 in.) to the interior surfaces of the hoppers. Ammonium nitrate Epoxy Hoppers ASTM A611 ASTM A570 Intergranular fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006402
EISBN: 978-1-62708-217-4
... to anodizing. A hot inhibited alkaline cleaner was also recommended during cleaning prior to anodizing. The panels should be dichromate sealed after anodizing. The use of deionized water was also recommended during the dichromate sealing operation. In addition, the use of an epoxy primer prior to shipment...
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
...) and Group 2 resistors. The group 2 resistor had been exposed to the heat of soldering for 90 s. Note the dark appearance of the top polymer coating. This is due to the pyrolysis, or breakdown, of the epoxy coating. 19.25× Fig. 3 Delaminated group 8 resistor that exhibited a low pushoff strength...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006929
EISBN: 978-1-62708-395-9
... of a tetraglycidyl methylenedianiline/diaminodiphenyl sulfone (TGMDA/DDS) system Table 5 Effect of absorbed moisture on the physical properties of a tetraglycidyl methylenedianiline/diaminodiphenyl sulfone (TGMDA/DDS) system Components A B TGMDA, parts 100 100 BPA epoxy novolac(a), pph 8.2...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006924
EISBN: 978-1-62708-395-9
..., and ungelled glass. Source: Ref 24 Fig. 12 Heat flow as a function of temperature at a heating rate of 10 °C/min (18 °F/min) for an epoxy-amine cured isothermally at 160 °C (320 °F). d H/ dt , measured heat flow; T g , glass transition temperature; ΔH res , residual heat of reaction; ΔH rxn...