【摘要】 研究预氧化、封接温度和保温时间等工艺参数对氧化铝透明陶瓷与Nb金属焊接接头结合强度及显微组织的影响。利用万能材料试验机和扫描电镜分别测试封接试样的剪切强度、显微组织及元素分布,并借助XRD分析界面物相。结果表明:1390℃下保温10min时,剪切强度最高,达到94.46MPa。焊料/Al2O3陶瓷界面上析出了Dy2Si2O7晶体,焊料/金属Nb界面附近形成了2μm左右厚的反应层。更多还原

【Abstract】 With sufficient investigating the effect of pre-oxidation,sealing temperature and holding time on the shear strength and microstructure of the Al2O3-Nb sealing materials.The shear strength,microstructure and element distribution of sealing material were investigated by the strength machine,scanning electron microscope (SEM) and energy dispersive spectrometer (EDS).Furthermore,the X-ray diffraction (XRD) was used to investigate the phase of sealing region.The strength results showed that the shear strength reached to 94.5MPa when the sealing temperature was 1390℃ and holding 10min,the XRD results showed that the Dy2Si2O7 phase was found in the sealant/Al2O3 interface.In addition,the thickness of reaction layer which was formed near the interface of sealant/Al2O3 was about 2μm.更多还原