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| Synthesis of Nano-phase Composite Al-Sn Alloy by Reaction Ball Milling Process and Its Performance |
| SONG Kaiqiang1,2, ZENG Meiqin1,2, ZHU Min1,2, HU Renzong1,2, LU Zhongchen2,3
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1 School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640;
2 Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, Guangzhou 510640;
3 School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640 |
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Abstract Reaction ball milling process was used to prepare Al-SnO2-MgH2 alloy powders, then a high thermal stability nanocomposite Al-Sn alloy was obtained by a combination of cold pressing and sintering. The effect of reaction ball milling process on the microstructure and properties were investigated by XRD and SEM. The results show that the SnO2 in the MA Al-SnO2-MgH2 alloy powder, which was produced by a two steps method with the addition of MgH2, was almost deoxidized into monolithic Sn after sintering at 600 ℃. Meanwhile, the in situ formed Sn exhibits a typical dual-scale structure. In particular, the symbiotic formed Sn and Al2O3 were in nano-size and homogeneously distributed in the Al matrix, improving the hardness obviously and resulting in a significantly reduction of friction coefficient and wear volume.
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Published: 25 June 2017
Online: 2018-05-08
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2017, Vol. 31 
