Patent · US Expired

Sintering tray

US5993970A · kind A · utility

14Cited by

5References

20Claims

0Family size

Assignee

SANDVIK AB · SE

Inventors

Ulf Oscarsson · Tumba, SE
Per Gustafson · Huddinge, SE
Chris Chatfield · Gimo, SE
Mikael Lagerquist · Upplands Väsby, SE

Key dates

Filing date	Apr 14, 1997
Grant date	Nov 30, 1999
Priority date	—
Expiry date	Apr 14, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31678
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The present invention discloses a method of sintering of cemented carbide or cermet bodies lying on graphite trays. By using graphite trays coated with a covering layer of Y.sub.2 O.sub.3 containing .ltoreq.20 wt-% ZrO.sub.2, or corresponding volumetric amount of other refractory oxides, e.g., Al.sub.2 O.sub.3 or combinations thereof, with an average thickness of .gtoreq.10 .mu.m, the life of the trays between regrindings and recoatings can be largely extended.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.