Patent · US Expired

Bearing material of silicon carbide

US5939185A · kind A · utility

1Cited by

3References

16Claims

0Family size

Assignee

Elektroschmelzwerk Kempten GmbH · DE

Inventors

Jochen Greim · Kempten (Allgäu), DE
Hubert Thaler · Kempten, DE
Michael Fundus · Kempten, DE

Key dates

Filing date	Oct 29, 1997
Grant date	Aug 17, 1999
Priority date	—
Expiry date	Oct 29, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/298
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A bearing material of silicon carbide particularly useful for application in the hot water field is provided having improved corrosion resistance under increased thermal stresses wherein the bearing material is characterized by a predominantly course-grained silicon carbide matrix of pressureless sintered silicon carbide having a biamodal grain sized distribution wherein the biomodal grain size distribution is formed by from 50 to 90% by volume of prismatic, tabular, silicon carbide crystallites having a length of from 100 to 1500 .mu.m and from 10 to 50% by volume of prismatic tabular silicon carbide crystallites having a length of from 5 to <100 .mu.m.

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