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| Microstructure and Property of In-situ TiB2 Particulates Reinforced Al-18%Si Composite |
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Received:March 19, 2012
Revised:March 23, 2012
Accepted:March 23, 2012
Published Online:September 19, 2012
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| DOI：10.3969/j.issn.1007-7545.2012.10.013 |
| KeyWord:in-situ reaction; TiB2; composite; microstructure; mechanical properties; wear resistance |
| Author | Institution |
| LI Qinglin |
兰州理工大学材料科学与工程学院 |
| LAN Yefeng |
兰州理工大学材料科学与工程学院 |
| WANG Qiangqiang |
三一集团杭州力龙液压有限公司 |
| FanLu |
兰州理工大学材料学院 |
| RenYanfei |
兰州理工大学材料学院 |
| Gaodun |
兰州理工大学材料学院 |
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| Abstract: |
| TiB2p/Al-18%Si composite was prepared by directional melt reaction in-situ synthesis process applying TiO2 and KBF4 powder as reactant and Na3AlF6 as covering agent. The microstructure of the composites were investigated by OM，SEM and EPMA respectively. The results show that the in-situ TiB2 particles are less than 1.0 μm, and uniformly distribute in the Al-18%Si matrix alloy, and the primary α-Al dendritic crystal and needle-like eutectic Si are refined in TiB2p/Al-18%Si composite. The hardness, tensile strength and wear resistance of TiB2p/Al-18%Si composite is improved dramatically compared with Al-18%Si alloy. |
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