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특허 상세정보

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Making of sintered silicon carbide bodies

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) C04B-035/56   
미국특허분류(USC) 501/90 ; 501/89 ; 501/91 ; 501/93
출원번호 US-0123918 (1993-09-20)
발명자 / 주소
인용정보 피인용 횟수 : 49  인용 특허 : 0
초록
▼

Pressureless sintering is used to densify silicon carbide based ceramics using a compound comprising transition metal oxides and aluminum oxide at temperatures in excess of 1850°C. The resulting sintered body has a density greater than 95% of its theoretical density, flexural strength in excess of 560 MPa and fracture toughness of 7.2 MPa.m½. The method consists of sintering and conversion of transition metal oxides into carbides in one step operation. Practically any transition metal oxide can be used. The sintered ceramic bodies made by the present inv...

대표
청구항
▼

A process for pressureless sintering of silicon carbide comprising: Forming a mixture consisting essentially of silicon carbide particles having a size from 0.3 to 5 micrometers and from about 1% to about 29% by weight of a transition metal oxide, from about 1% to about 29% by weight of alumina and from 0.1 to 5% by weight carbon; shaping the mixture into a green body; placing the green body into a sealed graphite crucible and surrounding the body with a powder bed consisting essentially of about 30 to 60% by weight of silicon carbide, from 68 to 38% by ...

이 특허를 인용한 특허 피인용횟수: 49

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  8. Yener, Doruk O.; Czerepinski, Jennifer H.; Iyengar, Sujatha; Kavanaugh, Michael D.; Brandes, Alan J.; Arcona, Christopher; Bauer, Ralph; Boussant-Roux, Yves; Panzarella, Tracy H.. Abrasive particles having complex shapes and methods of forming same. USP2017099771506.
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