Preparation of Al-based amorphous coatings and their properties  

作　　者：Lei Jin Le Zhang Kaige Liu Zhigang Che Kai Li Ming Zhang Bo Zhang 

机构地区：[1]Science and Technology on Power Beam Process Laboratory,AVIC Manufacturing Technology Institute,Beijing 100024,China [2]Department of Materials Application Research,AVIC Manufacturing Technology Institute,Beijing 100024,China [3]Aeronautical Key Laboratory of Advanced Surface Engineering Technology,AVIC Manufacturing Technology Institute,Beijing 100024,China

出　　处：《Journal of Rare Earths》2021年第3期340-347,I0004,共9页稀土学报（英文版）

基　　金：Project supported by the AVIC Unite Fund(KZ041605114);Civil Aircraft(MJ-2016-F-16)。

摘　　要：Al_(86)Ni_(8)Co_(1)La_(1)Y_(2)Gd_(2) amorphous coatings were prepared using cold gas kinetic spray technology.The results show that Al_(86)Ni_(8)Co_(1)La_(1)Y_(2)Gd_(2) amorphous coatings are achieved with the porosity about 3.2%,thickness about 893 μm,the amount of amorphous phase about 82.5%,the hardness about 300 HV0.2.The corrosion potential and anti-corrosion life of 7075 T6 alloy aluminum are about-0.78 V and 72 h,respectively.The electrochemical analysis and neutral salt spray are about-0.69 V corrosion potential and 274 h anti-corrosion life for amorphous Al-based coatings,respectively.Therefore,the life of the Albased amorphous coatings is about 3.8 times that of 7075 T6 aluminum alloy.Besides,the failure mechanism was analyzed using TEM in this investigation.In a word,Al_(86)Ni_(8)Co_(1)La_(1)Y_(2)Gd_(2) coatings keep dense structure,high amorphous content,favorable amorphous phase stabilizing ability and longer anticorrosion life.That is,Al_(86)Ni_(8)Co_(1)La_(1)Y_(2)Gd_(2) coatings have better comprehensive properties.Therefore,these findings indicate that the present Al_(86)Ni_(8)Co_(1)La_(1)Y_(2)Gd_(2) amorphous coatings prepared using cold gas kinetic spray technique can protect aluminum alloy very well and they can be considered to be used in aviation field.

关 键 词：Al-based amorphous material COATINGS Cold spray PROPERTIES Rare earths 

分 类 号：TG174.4[金属学及工艺—金属表面处理]