| 原位自生TiB2p/Al-18%Si复合材料的组织和性能 |
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| 引用本文： | 李庆林,兰晔峰,王强强,樊璐,任彦飞,高敦.原位自生TiB2p/Al-18%Si复合材料的组织和性能[J].有色金属(冶炼部分),2012(10):42-45. |
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| 作者姓名： | 李庆林 兰晔峰 王强强 樊璐 任彦飞 高敦 |
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| 作者单位： | 1. 兰州理工大学材料科学与工程学院,兰州,730050
2. 三一集团杭州力龙液压有限公司,杭州,311200 |
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| 基金项目： | 国家大学生创新性实验项目资助(101073107) |
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| 摘 要： | 采用TiO2和KBF4粉体为反应物,适量Na3AlF6为覆盖剂,用熔体直接反应法制备了TiB2p/Al-18%Si复合材料,通过OM、SEM和EPMA对复合材料的相及微观组织进行研究,并测试了常温条件下复合材料的硬度、抗拉强度和干滑动摩擦磨损性能。结果表明,原位反应生成的TiB2颗粒尺寸小于1μm,且大多数在Al-18%Si合金基体中均匀分布,粗大的α-Al枝晶和针状共晶Si组织得到细化;复合材料的硬度、抗拉强度、摩擦磨损性能高于无TiB2颗粒的Al-18%Si合金。
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| 关 键 词： | 原位反应 TiB2 复合材料 微观组织 力学性能 耐磨性 |
| 收稿时间： | 3/19/2012 2:51:27 PM |
| 修稿时间： | 2012/3/23 0:00:00 |
Microstructure and Property of In-situ TiB2 Particulates Reinforced Al-18%Si Composite |
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| LI Qinglin,LAN Yefeng,WANG Qiangqiang,FanLu,RenYanfei and Gaodun.Microstructure and Property of In-situ TiB2 Particulates Reinforced Al-18%Si Composite[J].Nonferrous Metals(Extractive Metallurgy),2012(10):42-45. |
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| Authors: | LI Qinglin LAN Yefeng WANG Qiangqiang FanLu RenYanfei and Gaodun |
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| Affiliation: | School of Materials Science and Engineering,Lanzhou University of Technology,,,,, |
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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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| Keywords: | in-situ reaction TiB2 composite microstructure mechanical properties wear resistance |
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