Ti(C,N)-Al2O3陶瓷基复合材料焊接技术研究
毕业论文关键词：陶瓷基复合材料；辅助脉冲电流扩散焊；力学性能试验
AbstractTi(C,N)-based cermets have excellent properties of high strength, high hardness, hightemperature, wear-resistant, low density, toughness and high thermal conductivity, etc., butbecause of its plastic deformation capacity is poor, difficult to process, greatly limits thescope of its application. Reliable ceramic-metal connection process, the Under normalcircumstances, the traditional method of welding technology is difficult to achieve, incontrast, diffusion welding process in connection cermet is a reliable and effectiveconnection method.In this paper, Ti(C,N)-Al2O3/Cu73Ti27/Cu/AgCu/40Cr intermediate layer ofTi(C,N)based cermets were studied diffusion welding technology. For different weldingparameters of welded joints and diffusion carried out by scanning electron microscopy(SEM) observations and spectroscopy (EDS) analysis. Mechanical tests by testing flexuralstrength of welded joints, fracture morphology and further analysis.The results showed that: Ti(C,N)-Al2O3/Cu73Ti27/Cu/AgCu/40Cr as an intermediatelayer, the auxiliary pulse current method by diffusion welding, welded joints usingscanning electron microscopic morphology, energy spectrum analysis, enables cermetlinked. This test also by bending strength test mechanical properties test joints. During thetest, diffusion bonding, the base element and the intermediate layer by interdiffusioninterface, forming a transition layer. Distribution of microstructure and interface elementsbecause of the different welding parameters and different. Leading to different mechanicalproperties of the joint.
Key words: Ceramic matrix composite materials; auxiliary pulse current diffusionwelding; mechanical testing
目 录
第一章 绪论..1
1.1 引言...1
1.2 陶瓷基复合材料的发展与应用 2
1.2.1 陶瓷基复合材料的发展. 2
1.2.2 陶瓷基复合材料的应用. 3
1.2.3 Ti(C,N)金属陶瓷的组织及性能. 4
1.2.4 Ti(C,N)金属陶瓷的研究进展. 5
1.2.5 Ti(C,N)基金属陶瓷的应用..5
1.3 陶瓷基复合材料的连接工艺.5
1.3.1 钎焊... 6
1.3.2 扩散焊...7
1.3.3 自蔓延高温合成焊接法. 8
1.3.4 激光焊...8
1.3.5 辅助脉冲电流扩散焊..8
1.4金属陶瓷的扩散焊接过程..9
1.5 Ti(C,N)-Al2O3陶瓷基复合材料的研究进展 9
1.6本文研究内容.10
第二章 试验材料、设备和方法..11
2.1 试验材料 11
2.2试验设备. 11
2.3实验过程. 13
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