Nano-structured alloy and composite coatings for high temperature applications

Materials Research

Wei Gao¹  Zhengwei Li¹ 

[1] ,The University of Auckland Department of Chemical & Materials Engineering ,New Zealand

关键词: Nano-materials;    coating;    high temperature corrosion;    metal-oxide composite coatings;    Ti and Ti-Al based materials;   

DOI  :  10.1590/S1516-14392004000100023

来源: SciELO

【 摘 要 】

Nano-structured materials often possess special properties that materials with identical compositions but ordinary grain size do not have. This paper reports our work on the surface nano-crystallisation and nano-structured alloy and composite coatings. A number of processing methods including magnetron sputtering, thermal spray and pulse electro-spark deposition have been used to produce surface nano-crystalline structure. The compositions and microstructures can be well controlled by using different targets or electrodes, nano-structured composites and adjusting processing parameters. Surface nano-structured coatings can provide special chemical, mechanical and electronic properties such as high temperature corrosion and corrosive wear resistance. It has potential applications such as turbine blades, engine parts for petrochemical, aerospace and electronic device industries. This paper is focused on the study of the interrelations between processing, microstructure and properties. Physical models have been established to explain the effects of nano-crystalline structure on the properties.

【 授权许可】

CC BY   
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