Process and Property of TiO<sub>2</sub> Coating cBN Composite Powder Prepared by Sol-Gel Method

LIANG Lixing; WANG Hailong; LI Jian; HU Biyong; SHAO Gang; XU Hongliang; LU Hongxia; FAN Bingbing; ZHANG Rui

doi:10.11973/jxgccl201809008

Materials and Mechanical Engineering > 2018 > 42(9): 37-40. > DOI: 10.11973/jxgccl201809008

LIANG Lixing, WANG Hailong, LI Jian, HU Biyong, SHAO Gang, XU Hongliang, LU Hongxia, FAN Bingbing, ZHANG Rui. Process and Property of TiO₂ Coating cBN Composite Powder Prepared by Sol-Gel Method[J]. Materials and Mechanical Engineering, 2018, 42(9): 37-40. DOI: 10.11973/jxgccl201809008

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Process and Property of TiO₂ Coating cBN Composite Powder Prepared by Sol-Gel Method

1. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China;
2. Zhengzhou University of Aeronautics, Zhengzhou 450015, China

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Received Date: July 30, 2017
Revised Date: August 13, 2018

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A layer of TiO₂ was coated on the surface of cubic boron nitride (cBN) particles by sol-gel method with anhydrous ethanol and water as dispersion medium and with tetrabutyl titanate as titanium source, and then cBN-TiO₂ composite powders were obtained. The effects of the molar ratio of anhydrous ethanol to butyl titanate and the molar ratio of cBN to butyl titanate on the coating effect were investigated. The preparation process was optimized. The oxidation resistance of cBN-TiO₂ composite powder under optimal process was studied. The results show that the surface of cBN particles was coated with a layer of dense TiO₂ uniformly when the molar ratio of anhydrous ethanol to butyl titanate was 10∶1 and the molar ratio of cubic boron nitride to butyl titanate was 1∶1, indicating the best coating effect. The initial oxidation temperature of cBN-TiO composite powder prepared under optimal process was 900 ℃, and was 220 ℃ higher than that of cBN micro powder before coating with TiO₂.
- cubic boron nitride,
- sol-gel method,
- coating,
- oxidation resistance

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Process and Property of TiO2 Coating cBN Composite Powder Prepared by Sol-Gel Method

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Process and Property of TiO₂ Coating cBN Composite Powder Prepared by Sol-Gel Method