7056 Glass-to-Kovar sealing－effect of interfacial roughness on the interfacial structures and mechanical property

• Main Authors: Wei-Cheng Hsu, 徐偉程
• Other Authors: Hsien-Lung Tsai
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/v32usz

碩士 === 國立臺灣科技大學 === 機械工程系 === 94 === The interfacial characteristic of the 7056 glass-to-Kovar sealing and wetting behavior of glass to Kovar were studied. The effect of oxide layer of Kovar on the glass-to-Kovar sealing was also investigated. With another treatment of oxidization as reoxidization, the interfacial structures between glass and Kovar are changed. The shear stress test was carried out to evaluate the influence of sealing experimental parameters on the shear stress strength of glass-to-Kovar sealing. The optical microscope (OM) was used for observation of interfacial characteristic. The scanning electronic microscope (SEM) was employed for investigating the composition distribution across the interface. Experimental results showed that the rough interface with by #600 abrasive paper had the fine and narrow dendritic structures, but the fine interface with reoxidization by #1500 had the loose and wide ones. Comparing the shear stress strength, the preoxidized Kovar-to-glass had better strength than the non-preoxidized sample such as the rough interface (#600) with the fine and narrow dendrtic structures, and the worse sealing strength was the fine interface (#1500) with loose and wide dendrtic structures. It proved the dendrtic structures were bad factors in the glass-to-metal sealing.