| 摘要 |
<p>An alumina-based composite sintered material comprising alumina as a main ingredient and containing one or more carbonitridation products of the groups IVa, Va and VIa of the periodical table and/or two or more carbonitridation products of solid solutions of the groups IVa, Va and VIa of the periodical table, in which the content of nitrogen solid solute in carbonitridation product increases from the interior to the surface of the sintered material and the Vickers hardness at the surface of the sintered material is 19.5 GPa or more in the alumina-based composite sintered material. <IMAGE></p> |
