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coating deposition

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Published: 15 January 2021
Fig. 30 Schematic of thermal/environmental barrier coating (T/EBC) architecture showing primary environmental protective subsystems and the microstructure of coatings deposited by electron-beam physical vapor deposition. CMAS, calcium-magnesium-alumino-silicate. Reprinted with permission from More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003563
EISBN: 978-1-62708-180-1
... Abstract A major cause of failure in components subjected to rolling or rolling/sliding contacts is contact fatigue. This article focuses on the rolling contact fatigue (RCF) performance and failure modes of overlay coatings such as those deposited by physical vapor deposition, chemical vapor...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001281
EISBN: 978-1-62708-215-0
... of the nozzle segments scanning electron microscopy (SEM) also revealed some blockage of the cooling holes ( Fig. 4 ). These holes appeared to be partially filled with deposit, which was typical of all three segments. Fig. 3 SEM micrograph showing missing coating in a deteriorated area. 12.4...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006787
EISBN: 978-1-62708-295-2
... Abstract High-temperature corrosion can occur in numerous environments and is affected by various parameters such as temperature, alloy and protective coating compositions, stress, time, and gas composition. This article discusses the primary mechanisms of high-temperature corrosion, namely...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... in the environment; change in the alloy or heat treatment; change in design; use of galvanic protection; use of inhibitors; use of nonmetallic coatings and liners; application of metallic coatings; use of surface treatments, thermal spray, or other surface modifications; corrosion monitoring; and preventive...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001589
EISBN: 978-1-62708-235-8
... Abstract The paper discusses the analysis of a coating defect on a high phosphorus electroless nickel (Ni-11 wt. % P) deposit plated on an aluminum alloy substrate. Preliminary investigations had indicated that the elongated defects were possibly caused by the entrapment of long fibers...
Image
Published: 01 June 2019
Fig. 1 Aluminum alloy 7075-T6 aircraft wing panel (a) showing unusual surface appearance. (b) SEM of the panel surface showing cracked anodized coating. 160x. (c) SEM showing the anodized coating flaking away and corrosion deposit under the coating. 85x. (d) Cross section of corrosion site More
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
...):  O 2 + 4 H + + 4 e − → 2 H 2 O (Eq 11) Oxygen reduction (neutral or basic solutions):  O 2 + 2 H 2 O + 4 e − → 4 OH − (Eq 12) Metalion reduction:  M 3 + + e − → M 2 + (Eq 13) Metal deposition:  M...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001516
EISBN: 978-1-62708-234-1
... magnetic coating is then sputtered by physical vapor deposition process or electrolytically or electroless deposited. In order to protect this magnetic film, which stores the data, a thin carbon film is sputtered. The carbon film acts both as a protective film and lubricant. The carbon overcoat, in its...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.homegoods.c0048674
EISBN: 978-1-62708-222-8
... electroplating to a mechanical deposition process. These two changes eliminated the possibility of hydrogen embrittlement, because acid cleaning was not needed after austempering and before plating. Also, mechanical deposition of zinc coating does not produce hydrogen embrittlement in hardened steel...
Image
Published: 01 June 2019
Fig. 1 Hard-faced austenitic stainless steel pump sleeve used to pump river water to a brine plant. The sleeve at left, coated with a fused nickel-base hard-facing alloy, shows severe abrasive wear by river-water silt after 3387 h of service. Sleeve at right, coated with plasma-deposited More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001624
EISBN: 978-1-62708-218-1
.... Some salt deposits were also noted in other areas along the wire surface. The findings suggest that salt or salt water had leaked into the sensor and caused localized corrosion to the wire, possibly at an area where preexisting damage was present in the coating. Separation occurred in the wire when...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0046378
EISBN: 978-1-62708-234-1
... pump sleeve used to pump river water to a brine plant. The sleeve at left, coated with a fused nickel-base hard-facing alloy, shows severe abrasive wear by river-water silt after 3387 h of service. Sleeve at right, coated with plasma-deposited chromium oxide, shows little evidence of wear after 5190 h...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047428
EISBN: 978-1-62708-235-8
... of the dragline bucket were warned against further hardfacing of these teeth. Hard surfacing Weld deposited coatings Steel casting Brittle fracture Surface treatment related failures A cast dragline bucket tooth failed by fracturing after a short time in service. The tooth was made of medium-carbon...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048634
EISBN: 978-1-62708-225-9
... of mobile hydrogen outward from the surface of the pin. After the cadmium layer was removed, the mobile hydrogen contained on the surface of the steel and in the electroplated deposit was released, and the embrittlement problem was alleviated. To prevent reoccurrence, the bright cadmium layer was stripped...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003555
EISBN: 978-1-62708-180-1
... Abstract High temperature corrosion may occur in numerous environments and is affected by factors such as temperature, alloy or protective coating composition, time, and gas composition. This article explains a number of potential degradation processes, namely, oxidation, carburization...
Image
Published: 15 January 2021
Fig. 26 Schematic of cross section of a thermal barrier coating (TBC). Calcium-magnesium-alumino-silicate (CMAS) deposits on the TBC surface, which upon melting, penetrate through voids and interfaces and change thermomechanical properties, increasing the TBC susceptibility to spalling More
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
... or a combination of ceramic and metal (cermet) materials, which are much harder than the underlying steel substrate ( Ref 136 ). Three major techniques are used for these coatings: physical vapor deposition, chemical vapor deposition, and thermal spray. Physical Vapor Deposition Coatings Overlay coatings...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001628
EISBN: 978-1-62708-234-1
... coatings that were potentially present on the outer diameter in typical nondiscolored and discolored regions. The analyses showed a high level of chromium in the nondiscolored area, while the discolored region showed no detectable chromium level. This suggests that some chromium was deposited near the ends...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001408
EISBN: 978-1-62708-220-4
... been sprayed, presumably over its frill length, the structure of the coating, depicted in Figure 5 , being quite typical of this process. The deposited metal appeared to be a plain carbon steel and a partial chemical analysis confirmed this, as it did not show more than a trace of chromium or nickel...