| 摘要 |
PROBLEM TO BE SOLVED: To provide superabrasive grains for forming a tool having strong abrasive grain holding force and excellent cutting ability and to provide the superabrasive grain tool. SOLUTION: This single crystal superabrasive grain is constituted by a plurality of crystalline planes, minute projections are formed on 111 plane and 100 plane among a plurality of crystalline planes, respectively, and the crystalline plane forming the minute projection has surface roughness obtained by a PV value of 0.1-5μm. The projection formed on the 111 plane among the crystalline planes is constituted by a trigonal pyramid-shaped growth trace or by laminating the trigonal pyramid-shaped growth traces, and the projection formed on the 100 plane among the crystalline planes is constituted by a square pyramid-shaped growth trace. A plurality of crystalline planes include the 111, 110, and 100 planes, the 111 and 100 planes have priority over the 110 plane to let them grow by a vapor phase composition process, and a distance between the ridge lines in the direction in which a distance between mutually opposing ridge lines among the ridge lines surrounding the 110 plane is smaller is 0.2D or less (D is diameter of the abrasive grain). This superabrasive grain tool is formed by using these superabrasive grains. COPYRIGHT: (C)2008,JPO&INPIT
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