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EFFECT OF Hf ON THE INTERFACIAL REACTION BETWEEN A NICKEL BASE SUPERALLOY AND A CERAMIC MATERIAL |
CHEN Xiaoyan, ZHOU Yizhou(), ZHANG Chaowei, JIN Tao, SUN Xiaofeng |
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 |
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Cite this article:
CHEN Xiaoyan, ZHOU Yizhou, ZHANG Chaowei, JIN Tao, SUN Xiaofeng. EFFECT OF Hf ON THE INTERFACIAL REACTION BETWEEN A NICKEL BASE SUPERALLOY AND A CERAMIC MATERIAL. Acta Metall Sin, 2014, 50(8): 1019-1024.
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Abstract The influence of Hf content on the wettability and interfacial reaction between a nickel base superalloy and a ceramic material was investigated by using a sessile drop method. The wetting angle was measured through the geometric parameters of the metal drop. The interfacial morphology and elements distribution were studied by SEM and EPMA, respectively. XPS was employed to study the phase formation at the metal-ceramic interface. The relationship between wettability and interfacial reaction was discussed. It was found that the wetting angle of the metal drop on the ceramic substrate was decreased with increasing Hf content in the alloy and the wettability of the studied superalloy on the ceramic material was enhanced with increasing Hf content in the alloy. When the content of Hf increased from 0.1% to 2.0% (mass fraction), the wetting angle decreased from 132° to 112°. The interfacial reaction led to a sharp decrease in wetting angle as Hf content was 1.5%. The product of interfacial reaction was HfO2 and the thermodynamic analysis indicated that Hf was able to substitute Si in SiO2 in the ceramic material.
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Received: 16 January 2014
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Fund: Supported by National Natural Science Foundation of China (Nos.U1037601, 51271186, 51331005, 11332010 and 51001103), National Basic Research Program of China (No.2010CB631206), Fund of the State Key Labortary of Advanced Technologies for Comprehensive Utilization of Platinum Metals (No.SKL-SPM-201213) |
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