Investigation of Ti coatings on cubic boron nitride (cBN) grits by discharge treatment in spark plasma sintering system |
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| Authors: | Rui Chang Yanhui Wang Jianbing Zang Yiqing Yu Jing Lu Xipeng Xu |
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| Affiliation: | 1. State Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao, Hebei 066004, PR China;2. MOE Engineering Research Center for Brittle Materials Machining, Huaqiao University, Xiamen 361021, PR China |
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| Abstract: | The Ti coatings on cubic boron nitride (cBN) grits were prepared by discharge treatment on a mixture of Ti powders and cBN grits in spark plasma sintering system. The uniform and full coatings with a thickness of ～1.2 μm were prepared at 850 °C for 60 min, which were constituted with TiB2, TiN, and Ti phases. The compressive fracture strength and toughness impact of the Ti-coated cBN grits were 11.6% and 7.4% higher than the cases of the pristine ones, respectively. With the aid of Ti coatings, the interface bonding strength between cBN grits and Fe-based matrix was improved by 335 MPa in the Fe-based matrix/cBN composites. |
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| Keywords: | Cubic boron nitride Ti Coatings Composites Spark plasma sintering |
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