HIP Modeling of Superalloy Powders

Borofka, J. C.; Kissinger, R.D.; Tien, J. K.

doi:10.7449/1988/superalloys_1988_111_120

Cited by 2 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…f and c parameters mainly depends on densification rate and compressive strength of compacts respectively. It can be concluded from both Borofka et al [24] study on Rene 95 nickel based alloy densification rate and Kim and Yang [6] study on Ti6Al4V titanium alloy densification rate, that both alloys have very similar densification rate at high temperature and pressure. Also, Ti6Al4V and nickel-chromiumcobalt alloy have relatively high tensile strength which is over 1000 MPa [25,26].…”

Section: Finite Element Analysismentioning

confidence: 83%

An investigation of densification behavior of nickel alloy powder during hot isostatic pressing

ElRakayby

Kim

Hong

et al. 2015

Advanced Powder Technology

View full text Add to dashboard Cite

Section: Finite Element Analysismentioning

confidence: 83%

An investigation of densification behavior of nickel alloy powder during hot isostatic pressing

ElRakayby

Kim

Hong

et al. 2015

Advanced Powder Technology

View full text Add to dashboard Cite

Hot Isostatic Pressing of YBa₂Cu₃O_7‐δ and YBa₂Cu₃O_7–δ/Ag Composites

Borofka

Hendrix

Attarwala

et al. 1993

Journal of the American Ceramic Society

View full text Add to dashboard Cite

Hot isostatic pressing (HIP) can be used to produce fully dense shapes of high-temperature ceramic superconductors. Densification modeling of monolithic YBa,Cu,07-8 and the composite YBa,Cu,O,-,/Ag systems allows an understanding of the HIP process and has led to the development of successful protocols for HIP of these materials. Ag metal is the best encapsulation material found for both systems. HIP of monolithic YBa,Cu,O,-, requires a slow ramp of pressure in order to prevent decomposition into more basic oxides such as Y,BaCuO, and CuO. HIP of composite YBa2Cu,0,-,/Ag requires careful powder processing to obtain dense material with a fine dispersion of Ag. I. IntroductionINCE the advent of ceramic high-temperature superconduc-S t o r s ,I,' the single most consuming occupation in this developing sector has been fabrication of useful parts. The fabrication of thin films has made significant progress by using methodologies which had been developed for the electronics industry. The fabrication of bulk shapes has made some progress, but the properties of the resulting materials still lag behind those of thin films. Successful processing must maintain oxygen stoichiometry.' This becomes difficult in bulk high-density material because of the low oxygen diffusivity of the YBazCu,O7-, phase and the lack of gas-phase transport at high densities. Grain texture is also important both because of the intrinsic transport properties4 and because of the grain boundary properties5,6A dispersion of metallic silver enhances the superconducting properties of the YBa,Cu,O,-, through several proposed mechanisms. Silver has an oxygen diffusivity much higher than YBa2Cu,0,-, in the temperature range where YBa,Cu,O,-, needs to absorb oxygen to become orthorhombic and superconducting. Filamentary oxygen conduction by silver allows a uniform oxygen distribution to be obtained rapidly. Silver is also quite ductile, makes good contacts with YBa,Cu,O,-, particles, and has a high coefficient of thermal expansion. All three of these properties contribute to a reduction in microcracking. The Ag metal also probably assists in forming a good electrical contact with a normal conductor.Hot isostatic pressing (HIP) adds flexibility to other bulk processing methodologies by performing consolidation without significant microstructural changes. The retention of fine grains is desirable for the development of texture through anisotropic P. K. Gallaghcr-contributing editor Manuscript No. 196226.

show abstract

HIP Modeling of Superalloy Powders

Cited by 2 publications

References 11 publications

An investigation of densification behavior of nickel alloy powder during hot isostatic pressing

An investigation of densification behavior of nickel alloy powder during hot isostatic pressing

Hot Isostatic Pressing of YBa₂Cu₃O_7‐δ and YBa₂Cu₃O_7–δ/Ag Composites

Contact Info

Product

Resources

About

HIP Modeling of Superalloy Powders

Cited by 2 publications

References 11 publications

An investigation of densification behavior of nickel alloy powder during hot isostatic pressing

An investigation of densification behavior of nickel alloy powder during hot isostatic pressing

Hot Isostatic Pressing of YBa2Cu3O7‐δ and YBa2Cu3O7–δ/Ag Composites

Contact Info

Product

Resources

About

Hot Isostatic Pressing of YBa₂Cu₃O_7‐δ and YBa₂Cu₃O_7–δ/Ag Composites