Effect of Y2O3 Addition on Microstructure and Properties of Laser Cladded Al-Si Coatings on AZ91D Magnesium Alloy

被引：8
|
作者：
Wan, Xiaofeng [1 ]
Tian, Chuang [1 ]
Li, Yi [1 ]
Zhou, Jingling [1 ]
Qian, Shuangqing [1 ]
Su, Lihong [2 ]
Wang, Li [1 ]
机构：
[1] Nantong Univ, Sch Mech & Mfg Engn, Nantong 226019, Peoples R China
[2] Univ Wollongong, Sch Mech Mat Mechatron & Biomed Engn, Wollongong, NSW 2522, Australia
来源：
MATERIALS | 2023年 / 16卷 / 01期
基金：
澳大利亚研究理事会;
关键词：
AZ91D magnesium alloy; laser cladding; Al-Si + Y2O3 coating; tribological property; wear resistance; corrosion resistance; MECHANICAL-PROPERTIES; WEAR-RESISTANCE; CORROSION-RESISTANCE; IMPROVEMENT; COMPOSITE;
D O I：
10.3390/ma16010338
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of Y2O3 addition on the microstructure and properties of the laser cladded Al-Si alloy coating on the surface of AZ91D magnesium alloy was investigated in this study. The experimental results showed that the Al-Si + Y2O3 cladding layers contained alpha-Mg, Mg2Si, Al4MgY and a small amount of Al12Mg17 phases. The coarse dendrites, reticulated eutectic structures and massive phases in the coatings tended to be refined and gradually uniformly distributed with the increased amount of Y2O3. The introduction of Y2O3 into the cladding layer favored the improvement of microhardness and wear resistance due to the grain refinement strengthening and dispersion strengthening. The addition of Y2O3 also promoted the reduction of localized corrosion sites and made the corrosion surface smoother, implying that the corrosion resistance of the Y2O3-modified coatings was better than that of the unmodified cladding layer.
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页数：15
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