[1]孙佳,王玉,付前刚.铌合金高温热防护及其抗氧化硅化物涂层[J].中国材料进展,2018,(10):051-55.[doi:10.7502/j.issn.1674-3962.2018.10.09]
　SUN Jia,WANG Yu,FU Qiangang.Thermal Protections and Silicide Coatings on Niobium Alloy[J].MATERIALS CHINA,2018,(10):051-55.[doi:10.7502/j.issn.1674-3962.2018.10.09]
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铌合金高温热防护及其抗氧化硅化物涂层()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
期数:
2018年第10期
页码:
051-55
栏目:
特约研究论文
出版日期:
2018-10-31

文章信息/Info

Title:
Thermal Protections and Silicide Coatings on Niobium Alloy
作者:
孙佳1; 王玉2; 付前刚1
（1. 西北工业大学 凝固技术国家重点实验室，陕西 西安 710072) (2. 西安工程大学纺织与材料学院，陕西 西安 710048）
Author(s):
SUN Jia1;  WANG Yu2;  FU Qiangang1
(1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical Univeristy, Xian 710072, China)
（2. School of Textiles and Materials, Xian Polytechnic University, Xian 710048, China)
关键词:
铌合金; 硅化物; 涂层; 制备技术; 抗氧化性能
Keywords:
Nb based alloy;  silicide;  coating;  preparation;  oxidation resistance
DOI:
10.7502/j.issn.1674-3962.2018.10.09
文献标志码:
A
摘要:
铌及其合金具有熔点高、密度适中、易焊接、高温强度和可加工性能良好等特点，被认为是理想的应用在1200~1500 ℃高温结构热端部件的候选材料，但其较弱的抗氧化性能是工程化应用的瓶颈。综述了铌及其合金的高温氧化特点和热防护方法，指出涂层方法是铌及其合金走向工程化应用的关键。介绍了近年来应用于铌及其合金表面的抗氧化涂层体系，其中硅化物涂层热防护体系因其表面能形成分布均匀、组织稳定且热扩散速率低的硅酸盐玻璃而抗氧化性能优异。总结了硅化物涂层的主要制备方法和组织特点，并对所得涂层的抗氧化性能进行了分析对比，指出抗氧化硅化物涂层的制备技术复合化是未来发展的方向。抑制硅化物涂层与铌及其合金基体的反应互扩散，进一步提高抗氧化硅化物涂层的使用温度，增加涂层的隔热性能、降低涂层的热发射率是未来亟待解决的问题。
Abstract:
Niobium and its alloys have high melting point, moderate density, excellent weldability and high temperature strength as well as good machinability, and are considered as ideal candidates for hotcomponents widely applied in high temperature range of 1200~1500 ℃. Unfortunately, the weak oxidation resistance severely restricts their engineering applications especially in the oxygencontaining environment. In present paper, oxidation behaviors and thermal protection approaches of niobiumbased alloys in hightemperature oxygencontaining environment are reviewed. It points out that the coating technique is the significant method to promote the hightemperature application of niobiumbased alloys to prevent oxygen penetration. The antioxidation coating systems built on the niobiumbased alloys are introduced according to the variety of coating techniques. Silicide coating, which exhibits the best oxidation resistance among all coating systems, has attracted great interests due to its advantages of generating a thermalstable, homogeneously phasedistributed and low oxygen penetration rate silicate glass on the surface. Different preparation methods and microstructure characteristics of the silicide coatings are mainly illustrated, such as the slurrysintering, halide activated pack cementation, spark plasma sintering and thermal spray, meanwhile the oxidation resistance of the obtained silicide coatings has been comparatively analyzed. The combined preparation technology is seen as an efficient way to deposit ultrahigh temperature antioxidation silicide coating for future development although it still now presents complicated process and numerous influencing factors. Suppressing mutual elemental diffusion between the silicide coating and niobiumbased alloy matrix, further increasing the operation temperature, improving the thermal insulation performance and lowering the thermal emissivity of silicide coatings are the important scientific issues to be solved in the future.
更新日期/Last Update: 2018-11-12