High thermal stability of diamond–cBN–B4C–Si composites
Jia Hong-Sheng1, Zhu Pin-Wen2, Ye Hao1, Zuo Bin1, E Yuan-Long1, Xu Shi-Chong1, Li Ji1, Li Hai-Bo1, ‡, Jia Xiao-Peng2, Ma Hong-An2
       

(color online) Raman spectra characterization of the samples (a) sintered at 5.2 GPa/1680 K for 3 min and (b) sintered at 5.2 GPa/1620 K for 5 min.