Preparation of Al-based amorphous coatings and their properties
来源期刊：JOURNAL OF RARE EARTHS2021年第3期
论文作者：Lei Jin Le Zhang Kaige Liu Zhigang Che Kai Li Ming Zhang Bo Zhang
文章页码：340 - 347
摘 要：Al86Ni8 Co1 La1 Y2 Gd2 amorphous coatings were prepared using cold gas kinetic spray technology.The results show that Al86Ni8 Co1 La1 Y2 Gd2 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,Al86Ni8 Co1 La1 Y2 Gd2 coatings keep dense structure,high amorphous content,favorable amorphous phase stabilizing ability and longer anticorrosion life.That is,Al86Ni8 Co1 La1 Y2 Gd2 coatings have better comprehensive properties.Therefore,these findings indicate that the present Al86Ni8 Co1 La1 Y2 Gd2 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.
Lei Jin1,2,3，Le Zhang1，Kaige Liu2，Zhigang Che1，Kai Li2，Ming Zhang2，Bo Zhang2
1. Science and Technology on Power Beam Process Laboratory,AVIC Manufacturing Technology Institute2. Department of Materials Application Research,AVIC Manufacturing Technology Institute3. Aeronautical Key Laboratory of Advanced Surface Engineering Technology,AVIC Manufacturing Technology Institute
摘 要：Al86Ni8 Co1 La1 Y2 Gd2 amorphous coatings were prepared using cold gas kinetic spray technology.The results show that Al86Ni8 Co1 La1 Y2 Gd2 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,Al86Ni8 Co1 La1 Y2 Gd2 coatings keep dense structure,high amorphous content,favorable amorphous phase stabilizing ability and longer anticorrosion life.That is,Al86Ni8 Co1 La1 Y2 Gd2 coatings have better comprehensive properties.Therefore,these findings indicate that the present Al86Ni8 Co1 La1 Y2 Gd2 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.
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