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ZHANG Zhong-li DING Yong WANG Xin YANG Guo-qiang SHEN Wei-wei HAN Hai-ling 《中国有色金属学会会刊》2010,20(6):992-996
The present work focuses on a new method combining cast-infiltration with thermal spraying technology to improve the surface corrosion resistance of magnesium alloy.A zinc-based alloy layer was fabricated on the surface of AZ91D magnesium alloy. The microstructure of the layer was characterized by scanning electron microscopy equipped with an energy dispersive X-ray spectroscopy(EDS).The phase constituent of these alloys was identified by X-ray diffractometry(XRD).The analysis results reveal that a zinc-based alloy layer with a thickness of 700μm can form on the surface of AZ91 alloy matrix.The layer is composed of Mg7Zn3,MgZn and a small amount of α-Mg solid solution.The results indicate that the corrosion-resistance of the specimen with a zinc-based alloy layer is much better than that of the specimen without the layer after being immersed in 5%NaCl solution for 240 h, and the layer is more protective for the AZ91 alloy. 相似文献
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SHS铸渗法制备表面金属-陶瓷复合材料 总被引:6,自引:0,他引:6
介绍了SHS铸渗法的实验方法 ,工艺参数以及影响铸渗溶覆质量的因素 ,利用自蔓延高温合成熔铸技术将 (Al2 O3-Fe -Cr)金属 -陶瓷的高温熔体铸渗在试样表面 ,形成厚度几毫米的铸渗熔覆层。在此基础上 ,使熔覆层中的Cr -Fe作梯度改变 ,从而获得梯度熔覆层结构 ,有利于提高熔覆层与基体的结合强度。 相似文献
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铸渗机理与改善铬铸渗层质量的研究 总被引:33,自引:2,他引:33
提出了铬铸渗层是田合金烧结层、纤焊层和熔合层三个区域构成的。指出机器高压制造合金膏块是改善铬铸渗层质量的有效工艺措施。 相似文献
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1 .Introduction Metal-matrix composites (MMCs) have developed since they first appeared in the 1960s. However, the high cost of current monolithic MMCs hampers their production on a large industrial cale From the point of view of their application, the service life of components usually relies on their surface properties. It is desirable 相似文献
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