The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 2012
Filed:
Nov. 07, 2007
Shuji Nakazawa, Kirishima, JP;
Yucong Wang, Kirishima, JP;
Masahide Akiyama, Kirishima, JP;
Takuya Gentsu, Higashiomi, JP;
Toshiyuki Sue, Kirishima, JP;
Shuji Nakazawa, Kirishima, JP;
Yucong Wang, Kirishima, JP;
Masahide Akiyama, Kirishima, JP;
Takuya Gentsu, Higashiomi, JP;
Toshiyuki Sue, Kirishima, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
A ceramic sintered body contains AlOcrystal grains, internal TiC crystal grains existing in the AlOcrystal grains and external TiC crystal grains other than the internal TiC crystal grains. The AlOcrystal grains and the external TiC crystal grains retain stress caused by the difference in thermal expansion coefficient remaining after sintering, so that the AlOcrystal grains and the external TiC crystal grains pull each other in the interface therebetween. As a result, when the ceramic sintered body is machined, micro-cracks generated in the interface can easily grow due to the residual stress in addition to the shearing force caused by the machining operation, so that machinability is improved.