摘要
采用Ti-Zr-Ni-Cu钎料对ZrB2-SiC陶瓷的真空钎焊工艺进行研究。借助SEM,EDS和XRD等分析测试手段,分析了接头的界面组织结构及性能。实验结果表明:接头界面产物主要有TiC,ZrC,Ti5Si3,Zr2Si,Zr(s,s),(Ti,Zr)(Ni,Cu)等。随着钎焊温度和钎焊保温时间的增加,钎焊接头中的Zr(s,s)层厚度不断增加,焊缝两侧灰色相Ti5Si3+Zr2Si的体积和数量逐渐增加并向焊缝中部生长伸展,焊缝接头中的黑色相TiC+ZrC的体积和数量明显增加,其分布贯穿整个焊缝。当钎焊温度为920℃,钎焊时间为10min时,钎焊接头的抗剪切强度最高,达到143.5MPa。
ZrB2-SiC ceramic composites were brazed by using Ti-Zr-Ni-Cu active filler in a vacuum furnace.The microstructure and mechanical property of the joints were analyzed by means of SEM,EDS and XRD.The results showed that the reaction products of the ZrB2-SiC ceramic composites joint brazed with Ti-Zr-Ni-Cu active filler were TiC,ZrC,Ti5Si3,Zr2Si,Zr（s,s） and（Ti,Zr）2（Ni,Cu）.With the increase of the brazing temperature and the holding time,the thickness of the Zr（s,s） was growing gradually;the volume and quantity of Ti5Si3＋Zr2Si were also growing gradually and it might grow into the center of the joint;the volume and quantity of TiC＋ZrC were obviously growing and it mostly grew through the joint.When the brazing temperature is 920℃ and the holding time is 10min,the ZrB2-based ultra-high-temperature ceramic composites joint achieves the maximum shear strength about 143.5MPa.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2010年第10期73-76,共4页
Journal of Materials Engineering
