Supported polycrystalline compacts having improved physical prop

Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Metal and nonmetal in final product

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

419 14, 419 48, 419 51, 428552, 75236, B22F 314, B22F 702

Patent

active

055122353

ABSTRACT:
Supported polycrystalline compacts having improved shear strength, impact, and fracture toughness properties, and methods for making the same under high temperature/high pressure (HT/HP) processing conditions. The method involves a HT/HP apparatus formed of a generally cylindrical reaction cell assembly having an inner chamber of predefined axial and radial extents and containing pressure transmitting medium, and a charge assembly having axial and radial surfaces and formed of at least one sub-assembly comprising a mass of crystalline particles adjacent a metal carbide support layer. The charge assembly is disposed within the chamber of the reaction cell assembly, with the pressure transmitting medium being interposed between the axial and radial surfaces of the charge assembly and the extents of the reaction cell chamber to define an axial pressure transmitting medium thickness, L.sub.h, and a radial pressure transmitting medium thickness, L.sub.r, the ratio of which, L.sub.h /L.sub.r being selected as less than 1. The reaction cell assembly containing the charge assembly then is subjected to HT/HP conditions selected as effective to sinter the crystalline particles into a polycrystalline compact layer and to bond the polycrystalline compact layer at an interface to the metal carbide support layer for forming a metal carbide supported polycrystalline compact. The supported compact is characterized as having an essentially constant or increasing residual compressive stress on the surface of its compact layer as portions of a predefined thickness, W, of its support layer, as measured from the interfaced, are incrementally removed.

REFERENCES:
patent: Re32380 (1987-04-01), Wentorf, Jr. et al.
patent: 2941241 (1960-06-01), Strong
patent: 2941248 (1960-06-01), Hall
patent: 2947611 (1960-08-01), Bundy
patent: 2947617 (1960-08-01), Wentorf, Jr.
patent: 3030662 (1962-04-01), Strong
patent: 3136615 (1964-06-01), Bovenkerk et al.
patent: 3141746 (1964-07-01), DeLai
patent: 3233988 (1966-02-01), Wentorf, Jr. et al.
patent: 3609818 (1971-10-01), Wentorf, Jr.
patent: 3743489 (1973-07-01), Wentorf et al.
patent: 3745623 (1973-07-01), Wentorf, Jr. et al.
patent: 3767371 (1973-10-01), Wentorf, Jr. et al.
patent: 3831428 (1974-08-01), Wentorf, Jr. et al.
patent: 3850591 (1974-11-01), Wentorf, Jr.
patent: 3852078 (1974-12-01), Wakatsuki et al.
patent: 3918219 (1975-11-01), Wentorf, Jr. et al.
patent: 4188194 (1980-02-01), Corrigan
patent: 4289503 (1981-09-01), Corrigan
patent: 4334928 (1982-06-01), Hara et al.
patent: 4394170 (1983-07-01), Sawaoka et al.
patent: 4403015 (1983-09-01), Nakai et al.
patent: 4673414 (1987-06-01), Lavens et al.
patent: 4714385 (1987-12-01), Komanduri
patent: 4778486 (1988-10-01), Csillag et al.
patent: 4797326 (1989-01-01), Csillag
patent: 4954139 (1990-09-01), Cerutti
patent: 5106792 (1992-04-01), Corrigan
patent: 5326380 (1994-07-01), Yao et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Supported polycrystalline compacts having improved physical prop does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Supported polycrystalline compacts having improved physical prop, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supported polycrystalline compacts having improved physical prop will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-626264

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.