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doi:.1007
A1203含量对等离子喷涂Ti02^A1203陶瓷涂层组织性能的影响
马然,贺定勇,蒋建敏
(北京工业大学材料科学与工程学院,北京100124)
摘
要:采用大气等离子喷涂方法制备Ti02—A1203陶瓷涂层,利用SEM和XRD分析了涂层的显微组织和相结构,
并研究了涂层的电阻率随温度变化的规律。研究结果表明:TiorAl203陶瓷涂层主要由金红石型Ti02、锐钛矿型Ti02、
Magneli相、a-A1203及丫_A1203组成。涂层的显微硬度和电阻率随A1203含量的增加而增加,在通电升温条件下涂层
的电阻率随温度升高而降低。
关键词:二氧化钛涂层;氧化铝;等离子喷涂;电阻率
中图分类号:;TQl74
文献标识码:A
文章编号:1007-9289(2010)02-0060-04
Influence of A1203 Content
the
Microstructure
and Properties of Ti02-A1203 Ceramic Coatings
by Plasma Spraying
MA Ran,HE Ding-yong,JIANG Jian-min
(College ofMaterials
Science and
Engineering,Beijing
University
ofTechnology,Beijing 100124)
Abstract:Ti02-A1203 ceramic coatings were produced by air plasma spraying microstructure and phase
composition of
the coatings were characterized by scanning electron microscopy(SEM)and X-ray diffraction(XRD).The
electrical resistivity ofthe coatings Was measured by electrifying heating
results
show that the TiOrAl203 ceramic
coatings are posed ofrutile,anatase,magneli,a-A1203
mircohardness and electrical resistivity of
the coatings increase with the increase of alumina
in
the
electrical resistivity of the coatings