| 摘要: |
| 采用Cu80Ti20钎料在1413~1493 K的温度,保温时间5~15 min的工艺条件下分别进行了Si3N4陶瓷的高温活性钎焊,在所选工艺条件下均成功得到了无明显缺陷和裂纹的钎焊接头,通过对接头组织和成分的分析,接头的组成为Si3N4陶瓷/TiN界面反应层/Cu-Ti化合物+Ti5Si3/TiN界面反应层/Si3N4陶瓷.在1413 K保温10min条件下,固溶体中的Ti元素扩散至钎缝与母材的界面并发生反应,形成了致密连续的厚度约为1 μm的反应层.获得了钎焊温度、保温时间、钎缝宽度及界面层厚度等对接头强度的影响规律,在试验中所采用的工艺参数条件下,接头抗剪强度达到了105 MPa. |
| 关键词: Si3N4陶瓷 活性钎料 高温钎焊 Cu-Ti |
| DOI： |
| 分类号: |
| 基金项目:江苏省自然科学基金资助项目(BK20131261) |
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| High temperature brazing of Si3N4 ceramic using Cu-Ti active filler metal |
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ZHANG Deku1, ZHANG Wenjun1,2, JIANG Jiamin1
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1.School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;2.Luoyang Sunrui Special Alloy materials Co., Ltd., Luoyang 471039, China
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| Abstract: |
| Self-joining of Si3N4 using Cu80Ti20 active filler metal was demonstrated under different process parameters. Joints with no defects and cracks were obtained as the holding time is about 5-15 min and brazing temperature is about 1 413-1 493 K. The results shown that the microstructure of the joint can be described as Si3N4 ceramic/TiN layer/Cu-Ti solid solution+Ti5Si3/TiN layer/Si3N4 ceramic. On the condition of 1 413 K/10 min,Element Ti of solid solution diffused to the interface and reacted with ceramic,then compact and continuous reaction layer of thickness about 1 μm formed. The effects of brazing temperature and holding time on the width of the brazing seam,interface layer and the strength of joint were investigated, respectively. On the prescribed experiment condition shear strength of joint was up to 105 MPa. |
| Key words: silicon nitride ceramic active filler metal high temperature brazing Cu-Ti |
