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論文
【年度】100
年研發成果
【項目】
論文
【領域】
關鍵技術科專
【類別】
生醫材化
| 計畫名稱 | 高值化學品技術開發與應用四年計畫 | | 論文名稱 | Joining of Al2O3 to 316SS Using Braze-infiltrated Ni Net | | 論文類型 | 期刊 | | 發表處 | ISIJ International, Vol. 51 (2011), No. 6, pp. 1017–1019 | | 發表人 | 郭東昊、葉凱庭、薛人愷、魏明雄 | | 發表日期 | 100/06/12 | | 國家 | 國外 | | 內容摘要 | Stainless steel and alumina with a large difference in thermal expansion were brazed together at 900℃ with the helps of a compressed nickel net and the braze alloys of AgCuTi and AgCu, followed with a heating rate of 30oC/min and furnace cooling. For type I brazing, no continuous reaction layer was observed at interfaces, the Ni net at the alumina side dissolved and nano-sized of TiNi3 precipitates as well as icron-sized Cu-Ni phase, and the net at the 316SS side became surface hardened by a solid solution reaction. To prevent the thermal-induced cracking, the Ag-based matrix provides a continuous and soft medium to release residual thermal stresses. To enhance the strength of the brazed joint, the soft Ag-based matrix is strengthened via precipitation hardening, solid solution hardening, and filament reinforcement. Shear strength of the joint up to 384 MPa was obtained if Al2O3 substrate was in a good quality. The brazed joint survived after four cycles of harsh thermal shock tests from 800oC to room temperature. |
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