摘要
采用包覆、机械混合与团聚烧结工艺制备了多尺度WC-17Ni和ZYT10001A(WC-17%Co),WCTN(WC-17%Co)金属陶瓷粉末。用3种粉末冷喷涂沉积涂层,运用扫描电镜分析了涂层的组织结构、X射线衍射表征粉末与涂层的物相结构,用压入法测定了涂层的显微硬度、弹性模量和断裂韧性。研究结果表明,3种粉末沉积的涂层均具呈现致密的组织结构,涂层中的相结构没有发生变化。3种涂层的显微硬度、弹性模量和断裂韧性分别在(650.8±40.4)～(1350.0±115)HV0.3、(182.6±66.6)～(309.9±52.9)GPa和(13.12±4.44)～(24±1)MPa.m1/2之间变化,其中以ZYT10001A(WC-17%Co)涂层的硬度值最大及断裂韧性值最小。
WC-17Ni, ZYT10001A （WC-17% Co） and WCTN （WC-17% Co） powders fabricated by cladding, mechanical mixing, agglomerate-sintering method respectively were deposited on stainless steel substrate to obtain WC cermet coatings by cold spraying. Microstructure of the coatings was studied by scanning electron microscopy, phase composnent was investigated by means of X-ray diffraction, and the microhardness, elastic modulus and fracture toughness were measured by indentation method. The results show that the coatings depsited by using three kinds of powders exhibited dense microstructure. The phases of the feedstocks remained unchanged in the coatings. The microhardness, elastic modulus and fracture toughness of the coatings varied from （650.8±40.4） to （1350.0±115）HV0.3,（182.6±66.6） to （309.9±52.9）GPa and （13.12±4.44） to （24±1） MPa. m^1/2 , respectively, and ZYT10001A （WC-17% Co） coating had the highest value of microhardness and the lowest value of fracture toughness in the three coatings.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第2期162-167,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金项目(50961007
51001056)
江西省自然科学基金项目(20114BAB206019
2010GQC0117)
江西省教育厅科技项目(GJJ12610
GJJ12622)
关键词
粉末制备工艺
冷喷涂
金属陶瓷涂层
断裂韧性
弹性模量
powder fabricating process
cold spraying
cermet coating
fracture loughness
elastic modulus
