Al2O3/STS 304 스테인리스강의 브레이징에 의한 계면접합 = Interfacial Bonding between Al2O3 and STS 304 Stainless Steel by Brazing

다국어 초록 (Multilingual Abstract)

Al₂O₃has been joined to STS304 stainless steel by a brazing method using Al-10 wt% Si insert-metal. The joining has been performed in a vacuum hot press under 4 mPa vacuum varying the conditions such as temperature(850-953 K), holding time(0-3.6 ksec) and applied contact pressure(0-9. 8 ㎫). With use of SEM, EDX and XRD observation of the morphology and microstructure for a bonded interface and the analyses for existing elements and phases have been carried out to investigate possible reaction(s) at the bonded interfaces. No reaction at the interface between Al₂O₃and insert-metal has occured but a formation of reaction layer between STS304 and insert-metal layer has been observed which is composed of Al, Si, Fe and Cr. The thickness of reaction layer increases with a joining temperature and a holding time. In the insert-metal layer the acicular eutectic Si-phase and the new ternary compound of (Al, Fe, Si) exist in the Al-matrix after the joining. The strength of joined body measured by a tensile test has been varied with the joining conditions. The maximum average strength of 32 ㎫ has been obtained from the joints which were joined at 873 K for 1.8 ksec under a contact pressure of 4. 9 ㎫.

목차 (Table of Contents)

• 1. 서론
• 2. 실험방법
• 3. 결과 및 고찰
• 접합부의 SEM 관찰 및 EDX 분석
• 접합부의 XRD 분석
• 접합계면형성 및 접합강도에 미치는 접합조건의 영향
• 4. 결론