Low-temperature diffusion brazing of actively metallized Al2O3 ceramic tube and 5A05 aluminum alloy
Low-temperature diffusion brazing of actively metallized Al2O3 ceramic tube and 5A05 aluminum alloy
复制标题
活性金属化Al2O3陶瓷管与5A05铝合金的低温扩散钎焊
DOI：
10.1016/j.matdes.2015.07.112
复制
发表时间：
2015-12
影响因子：
8.4
通讯作者：
J.C. Feng
中科院分区：
文献类型：
--
作者：
Y. Wang;Z.W. Yang;L.X. Zhang;D.P. Wang;J.C. Feng
开发了一种低温陶瓷-金属连接技术，成功地制备了Al_2O_3陶瓷与5A05铝合金的真空密封性接头，其漏气率小于1×10−和9PA∙m~3/S，这包括两个步骤：用Ag-Cu-TiH_2-B复合钎料对Al_2O_3陶瓷表面进行活性金属化，然后在530℃下对金属化的Al_2O_3陶瓷与5A05合金进行扩散钎焊。接头性能取决于在Al_2O_3陶瓷附近形成的连续的Ti3Cu3O反应层、钎缝中原位合成的TiB晶须以及5A05合金的溶解厚度。接头的最大剪切强度可达70℃/h，断裂在Al_2O_3基材上扩展，呈弯曲裂纹路径。建立了定量评价5A05铝合金扩散钎焊熔化厚度的数学模型。
A low-temperature ceramic–metal joining technique was successfully developed to produce a vacuum-tight Al2O3ceramic and 5A05 aluminum alloy joint, with leak rates of less than 1.0 × 10− 9Pa∙m3/s. This involved two steps: active metallization of the Al2O3ceramic surface using Ag–Cu–TiH2–B composite filler, followed by diffusion brazing of metallized Al2O3ceramic and 5A05 alloy at 530 °C. The microstructure, interfacial reactions and mechanical properties of the actively metallized Al2O3ceramic and diffusion-brazed Al2O3/5A05 joint were investigated. The joint properties were determined by the formation of a continuous Ti3Cu3O reaction layer adjacent to Al2O3ceramic, in situ synthesized TiB whiskers in the brazing seam, and dissolution thickness of 5A05 alloy. The maximum shear strength of the bonded joints reached 70 MPa, while fracture propagated in the Al2O3substrate, with a bowed crack path. A model for quantitatively evaluating the dissolution thickness of 5A05 aluminum alloy during diffusion brazing process was established.
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影响因子：
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作者：
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DOI：
10.1016/j.msea.2012.05.110
发表时间：
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影响因子：
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作者：
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