Reaction of cubic boron nitride with titanium iodides

Conclusions The reaction of cubic boron nitride with the gaseous phase of titanium iodides (process duration 0.25–2.0 h, total pressure of titanium iodides 100 Pa) results in the preferential formation of TIN in the temperature range 900–1200°K and of titanium nitride and titanium diboride at 1200–1300°K.Translated from Poroshkovaya Metallurgiya, No. 10(262), pp. 57–59, October, 1984.     

Oxidation of a composite material based on cubic boron nitride

Powder Metallurgy and Metal Ceramics -     

立方氮化硼超硬刀具材料的合成与性能研究

以CBN微粉、WC粉和Co粉为原料,在六面顶压机上合成PCBN复合片。研究了立方氮化硼超硬刀具材料（PCBN复合片）的合成规律,对PCBN复合片的微观结构和性能进行了分析。研究发现,当烧结温度为1 750℃时,WC/Co结合剂对CBN颗粒的结合力增强,此时样品的磨耗比最大,为7 750。将1 750℃烧结出的PCBN复合片做成刀具,连续切削球墨铸铁,切削里程为20 km时,PCBN刀具后刀面磨损量（VB）最小,为0.272 mm。随着温度升高,样品中的颜色偏差越来越少,厚度分布越来越均匀,平整度逐渐变好,说明提高烧结温度有助于提高复合片中CBN聚晶层的平整度。     

Gas-phase deposition of titanium coatings on grains of cubic boron nitride

Translated from Poroshkovaya Metallurgiya No. 4(340), pp. 40–44, April, 1991.     

Elastic constants and elasticity moduli of cubic and wurtzitic boron nitride

Elasticity moduli and elastic constants for sphaleritic and wurtzitic boron nitride are calculated and determined by experiment. Numerical values are given for single crystals of these materials and polycrystals of hexanite-R, elbor-R, belbor, kiborite, and other superhard materials. An approach is suggested for combining hot pressing at ultrahigh pressures and a pulsed ultrasonic technique which may be used to determine the elasticity modulus and elastic constants of the majority of refractory compounds which are difficult to determine by other techniques.Institute of Materials Science, Ukrainian Academy of Sciences, Kiev. Institute of Metal Physics, Ukrainian Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 7/8(380), pp. 92–99, July–August, 1995.