Microstructure Evolution of Ti/BN Powder Blend during Ball Milling and Heat Treatment |
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| Authors: | Jianlin LI Keao HU Yong ZHONG |
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| Affiliation: | Institute of Composite Materials, Shanghai Jiao Tong University, Shanghai 200030, China |
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| Abstract: | Ball milled Ti/BN composite powder was prepared by high energy ball milling for 40 h, using Ti and BN (the molar ratio of Ti/BN is 3:2) as starting materials. The as-milled composite powder consists of TiN, Ti and amorphous phase. TiN formed while the milled powder was annealed at 400℃. The heat treatment at 700℃ led to the formation of TiB2 and TiB. The nanocrystalline Ti and amorphous phase converted to TiN and TiB2 when the powder was heated to 1300℃. |
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