Sintered ceramics for cutting tools and manufacturing process thereof

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United States of America Patent

PATENT NO 4325710
SERIAL NO

06129318

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Abstract

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A sintered ceramics for cutting tools having a relative apparent density of not less than 98% is obtained by sintering a mixture substantially consisting of 80-95% by volume alumina and the balance of titanium nitride and Zr-containing component(s) such as Zr, ZrC and/or ZrN wherein the volumetric ratio of TiN /Zr-containing component(s) ranges 95/5-50/50 in vacuum and/or vacuum inert atmosphere. Although the present invention does not need any application of hot pressing or HIP process, the resultant ceramics has an improved abrasion resistance comparable to those obtained by the latter processes.

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Patent Owner(s)

Patent OwnerAddress
NGK SPARK PLUG CO LTD14-18 TAKATSUJI-CHO MIZUHO-KU NAGOYA-SHI AICHI 4678525

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tanaka, Hiroshi Iwakura, JP 1068 12184
Yamamoto, Yoshihiro Iwakura, JP 139 715

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