INFLUENCE OF TiВ2-TiB2-(SECONDARY) BORIDS ON STUCTURE, PROPERTIES AND ABRASIVE WEAR OF HOT-PRESSING CMC-COMPOSITES B4C–(TiВ2–TiН2)

Abstract

composite of B4C–5÷15 mass.% (TiВ2-TiН2) system. A dense, strong materials with a high bending strength Rbm 520–580 MPa and increased fracture toughness K1с 4,6–5,4 MPa·m1/2, while maintaining the hardness HKN 23,8–25,9 GPa, have been produced. An increase of the content of titanium diboride in the composites up to 10 % provides an increase of the wear resistance of materials by 2.1–2.3 times. The manufactured of CMC–composites from boron carbide are promising for use in hard abrasive wear