TiCp/Ag-Cu-Ti复合钎料膜制备及其在SiC陶瓷连接上的应用
Preparation of TiCp/Ag-Cu-Ti composite filler film and its application to SiC joining
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摘要: 采用通用型流变仪研究分散剂种类及含量、粘结剂含量和浆料固含量对浆料流变性的影响；采用SEM、EDS研究SiC接头的微观结构和相组成，探讨影响抗弯强度的因素。结果表明,分散剂蓖麻油磷酸酯的质量分数为5%、粘结剂PVB的质量分数为2.6%及固含量的体积分数为26%时，浆料流变性良好，复合钎料膜韧性好，增强体分布均匀。以此膜连接SiC陶瓷接头的微观结构结果表明，连接界面致密无缺陷，界面反应层厚度为0.9～1.5 μm，增强体TiC均匀分散金属钎料基体中，与金属钎料无化学反应；TiC加入可提高连接部件的抗弯强度，而抗弯强度与反应层厚度关系密切，SiC连接部件最高抗弯强度为92 MPa，而此时的反应层厚度为1.5 μm。Abstract: Rheological property caused by dispersant and its content, binder content and solid loading was studied through General Rheometer. The microstructure and phase composition of SiC joint were studied by SEM and EDS and factors affecting the connection strength were also discussed. Results showed that the rheological property of the slurry was better at 5wt.% castor oil phosphate of dispersant, 2.6wt.% PVB of binder and 26vol.% solid loading, the composite filler film toughness is perfect, and the reinforcement is homogeneously distributed. The microstructure of the SiC joint using the composite filler film as filler indicated that the interface is dense and no defects between the SiC joint, its the thickness is 1.0～1.5 μm and the reinforcements TiC are uniformly dispersed in the metal filler matrix with no chemical reaction. TiC addition can improve the connection strength. However, the main factors affecting the strength is the thickness of the reaction layer. The maximum four-point flexural strength of the brazed joints is 92 MPa when the thickness of the reaction layer was 1.5 μm.
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Keywords:
- composite filler /
- TiC ceramic powder /
- tape casting /
- microstructure /
- mechanical property
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[1] 雷玉珍,宋晓国,胡胜鹏,等.SiCp/2024Al复合材料与SiC陶瓷的软钎焊[J].焊接，2016(3)：14-17. [2] 李世普. 特种陶瓷工艺学[M]. 武汉：武汉工业大学出版社，1990. [3] Lin G B，Huang J H，Zhang H. Joints of carbon fiber-reinforced SiC composites to Ti-alloy brazed by Ag-Cu-Ti short carbon fibers[J]. Journal of Materials Processing Technology，2007，189:256-261. [4] 郭永权.Sn-Cu-Ni系钎料的研究现状[J].焊接,2015(12)：16-24. [5] Liu Y，Qi Q，Zhu Y Z, et al. Microstructure joining strength evaluation of SiC/SiC joints brazed with SiCp/Ag-Cu-Ti hybrid tapes[J]. Journal of Adhesion Science and Technology，2015，29(15):1563-1571. [6] 杜 鹏,白 钢,邵长斌,等.Ag 基与Cu基钎焊硬质合金与钛合金组织及性能对比研究[J].焊接,2014(1):34-38. [7] Yu M X，Zhang J X，Li X G，et al. Optimization of the tape casting process for development of high performance alumina ceramics[J]. Ceramics International，2015，41:14845-14853. [8] 巴学巍，李 江，潘裕柏，等.水基流延成型制备复合结构YAG透明陶瓷[J].稀有金属材料与工程，2013，42(6)：234-237. [9] Liu Yan , Qi Qian , Zhu Yunzhou, et al. Microstructure and joining strength evaluation of SiC/SiC joint with TiCp/Ag-Cu-Ti hybrid tapes[J]. Journal of Adhension Science and Technology,2015,29(15):1563-1571.
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