Title:
HIGH-TOUGHNESS SILICON NITRIDE-BASED COMPOSITE SINTERED COMPACT AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP2743638
Kind Code:
B2
Abstract:
PURPOSE: To provide a high-toughness sintered compact to be used in automotive parts, wear-resistant tools, etc.
CONSTITUTION: The objective sintered compact with titanium nitride dispersed in a Matrix phase composed of 10-90 vol% of silicon nitride, the rest of silicon oxynitride and grain boundary phase. The present sintered compact can be obtained by the following processes: a mixture of noncrystalline silicon nitride and titanium dioxide is heat treated at 1300-1800°C for 1-100hr in a nitriding atmosphere to produce composite fine powder, a sintering aid is then added to the powder followed by preliminary molding and then sintering at 1500-1900°C for 2-10hr. In this way, the objective silicon nitride ceramic excellent in both mechanical strength and breaking toughness can be produced and expected for applying to various structural members including automotive parts.
Inventors:
Matsui dragon
Application Number:
JP20430691A
Publication Date:
April 22, 1998
Filing Date:
August 14, 1991
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
C04B35/584; C04B35/58; (IPC1-7): C04B35/584
Domestic Patent References:
| JP1179761A |
Attorney, Agent or Firm:
Hidetake Komatsu (2 outside)
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