PURPOSE: To provide a method for preparing cubic boron nitride at a high conversion ratio by only one shot of impact compression without using a raw material reqiring a special method of preparation. CONSTITUTION: A high dynamic pressure is applied to a mixture in which a low-pressure-phase boron nitride is dispersed uniformly in a matrix to transform the low-pressure-phase boron nitride into a high-pressure-phase boron nitride. The use of spherical particles as the matrix is the feature of this process. For example, the spherical particles of inorganic compounds including metals of copper, tungsten, iron, and nickel, carbonates and sulfates of alkali metals are used as the matrix. COPYRIGHT: (C)1992,JPO&Japio




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Cited By (3)

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    EP-2075055-A1July 01, 2009Kuraray Luminas Co., Ltd.Capsule cible d'impact et compresseur d'impact
    EP-2075055-A4April 08, 2015Kuraray CoAufprallzielkapsel und schlagkompressor
    JP-2009067637-AApril 02, 2009Sumitomo Electric Hardmetal Corp, Sumitomo Electric Ind Ltd, 住友電工ハードメタル株式会社, 住友電気工業株式会社Cubic boron nitride sintered compact and method for producing the same