Influence of heat treatment temperature on microstructure and bonding of TiO2 film coated on diamond particles surface

• DOI: 10.1007/s11595-017-1703-x
• Publication Date: 2017-10-06T07:35:53Z
• Authors: Xiaopan Liu; Weibing Kong; Haiyan Xiao; Hao Tang; Long Wan; Weida Hu; Wei Wang
• Keywords: Carbon fibers

TiO2 films were coated on the surface of diamond particles using a sol-gel method. The effects of heat treatment temperature on the morphology, phase composition and chemical bond of diamond particles coated with TiO2 films were investigated through SEM, TEM, X-ray diffraction analysis, Raman spectroscopy, FTIR, and XPS. The results showed that when being heat-treated at 600 °C, the amorphous TiO2 film transfered to the anatase film which bonded well with diamond substrate. Meanwhile, the Ti-O-C bond formed between TiO2 film and diamond substrate. When being heat-treated at 800 °C, TiO2 film was still anatase, and partial diamond began to graphitize. The graphitizated carbon could also form the Ti-O-C bond with TiO2 film, although TiO2 film would tend to crack in this case.