摘要
研究了Hf对一种高温合金与陶瓷材料润湿性及界面反应的影响.测量了合金熔体与陶瓷材料的平衡润湿角,通过SEM,EPMA和XPS研究了合金与陶瓷材料的界面组织形貌、反应区元素分布及界面反应产物,分析了Hf对合金熔体与陶瓷材料润湿性及界面反应的影响,阐述了润湿性与界面反应的关系.结果表明,高温合金中Hf元素的含量会影响合金熔体与陶瓷材料的润湿性.对于本工作的合金,当Hf含量从0.1%逐渐增大至2.0%时,润湿角由132°逐渐减小至112°,润湿性显著增强;当Hf含量达到1.5%时,合金熔体与陶瓷材料发生界面反应,界面反应使润湿角明显减小,反应产物为HfO2.界面反应热力学分析结果表明,Hf和SiO2满足发生置换反应所需的热力学条件.
The influence of Hf content on the wettability and interracial reaction between a nickel base super- alloy and a ceramic material was investigated by using a sessile drop mothod. 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 in- terface. 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 wet- tability 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 in- terfacial reaction was HfO2 and the thermodynamic analysis indicated that Hf was able to substitute Si in SiO2 inthe ceramic material.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第8期1019-1024,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金项目U1037601
51271186
51331005
11332010和51001103
国家重点基础研究发展计划项目2010CB631206
云南省院省校合作项目2012IB002
稀贵金属综合利用新技术国家重点实验室开放课题SKL-SPM-201213资助~~
关键词
高温合金
陶瓷材料
润湿性
界面反应
HF
superalloy, ceramic material, wettability, interfacial reaction, Hf
