THERMAL-EXPANSION BEHAVIOR OF TIB2 ZRC CO MPOSITE PREPARED BY SUBSTITUTIONAL REACTION SINTERING METHOD/

Thermal expansion behavior of a composite consisting of titanium dibor ide and zirconium carbide has been described. The specimen was a high density sintered body prepared from powders of zirconium diboride and titanium carbide by substitutional reaction sintering. As the density of the sintered body was very high, thermal expansion of this composit e was measured. The average value of linear thermal expansion coeffici ent was 7.8 x 10(-6)/K between 298 and 1173 K, which agreed with the r esult from XRD analysis of a powder mixture of titanium diboride and z irconium carbide.