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encapsulant

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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
...Abstract Abstract The crosslinked epoxy resin encapsulant protecting an electromagnetic valve coil failed during long-term storage and was examined to determine the cause. The investigation included fault-tree analysis, FTIR and EDX spectroscopy, and differential scanning calorimetry...
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
... 75 mm (3 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...
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
... for the recommended soldering and encapsulation profiles. This inadequacy was amplified by the presence of the layer of polymer-based contamination at the metallization interface. In order to support this conclusion, it is necessary to understand the failures. Two types of failures were observed: total...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001130
EISBN: 978-1-62708-214-3
... as specified, and the fittings, including the chain line used to suspend the seat, were galvanized. The presence of zinc was verified by spot chemistry. The design for bonding the encapsulating elastomeric swing-seat reinforcement through punched holes is accepted practice for preventing separation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001676
EISBN: 978-1-62708-229-7
... encapsulated assembly (open to the moderator) or in a fully encapsulated assembly (contained in a Zircaloy-2 guide tube). There are two types of fully encapsulated assemblies: (i) sealed but having a He feed - the system can be permanently flushed with He or periodically purged leaving a static He atmosphere...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001297
EISBN: 978-1-62708-215-0
... of encapsulating the lead wool would also have prevented the galvanic corrosion, corrosion pitting, and resulting fatigue failure. ...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001901
EISBN: 978-1-62708-218-1
... was purchased from an American manufacturer in September of 1994. One of the appointments of the vehicle was an indicator light that signaled when the washer fluid required refilling. This light was actuated by a sensor that was partially encapsulated by a white plastic body that was plugged into the base...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001336
EISBN: 978-1-62708-215-0
... design. The weld zones were completely encapsulated in plastic, molded to provide a gasket surface. The undesirable chlorine residues were the result of contamination. After a methodical check of chlorine sources (trichloroethane degreasers, hydrochloric acid pickling solutions, sodium chloride water...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001658
EISBN: 978-1-62708-229-7
... deposits were examined by optical metallography and by electron microprobe analysis. Since both deposits were porous, they were vacuum impregnated with an epoxy compound before standard encapsulation in Bakelite and diamond polishing for optical metallography. They had been analyzed chemically earlier...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001548
EISBN: 978-1-62708-219-8
... by the water based glue and fire retardant paint (5%). The resultant high moisture content ordinarily would dissipate through the edges of the panel. In this case, because the panels were edge coated, the rate of moisture loss was significantly reduced. When the total assembly was essentially encapsulated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001489
EISBN: 978-1-62708-217-4
... hand, have no detrimental effects on the fatigue life of the component. They eliminate the stresses due to oxides, and if they encapsulate the inclusions, the detrimental effects of the oxides are completely offset. 12 , 13 Thus, it can be concluded that the types of inclusions in ring...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003532
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
... effects. The most common mounting method uses a device, called a mounting press, to provide the required pressure and heat to encapsulate the specimen with a thermosetting or thermoplastic mounting material. Common thermosetting resins include phenolic, diallyl phthalate, and epoxy, while methyl...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003548
EISBN: 978-1-62708-180-1
... To prevent the root cause of the failure, the causes of galvanic corrosion needed to be eliminated. The integrity of the seal needed to be ensured. A barrier coating between the lead and aluminum wall could be added. Alternate means of encapsulating the lead wool were also suggested. The corrective action...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006783
EISBN: 978-1-62708-295-2
... to failure of the assembly. Corrective Actions To prevent this failure, the root causes of galvanic corrosion needed to be eliminated. The integrity of the seal needed to be ensured. A barrier coating between the lead and aluminum wall could be added. Alternate means of encapsulating the lead wool...