TeO2晶体的力学性能及缺陷分析
关键词： 二氧化碲、显微硬度、断裂韧性、缺陷
Mechanical properties and defect analysis of paratellurite crystal
Abstract：Mechanical properties are important aspects of material performance, which mainly manifests for the external interaction against the materials in the process of producing, processing and using. So, this paper chooses (001) and (110) surface of an acousto-optic crystal called TeO2, which has important application background, as its object of the research. What’s more, micro-indentation experiment system is used in the thesis to study the mechanical properties of TeO2.After using a micro hardness tester, impression diameter of TeO2 was correctly measured, and then fracture toughness of TeO2 was calculated. The data showed that the Vickers hardness of (001) and (110) surfaces were respectively (3.32, 3.22, 3.10; 4.78, 4.44, 4.00) under the load of 0.1 kg, 0.2kg, 0.3kg. In addition, the Vickers hardness of (110) surface was gradually reducing, while the load was increasing. Therefore, the hardness values of (001) and (110) surfaces are different, which shows uneven packing density in the crystals of TeO2. Through the corrosion experiment, the defects on (001) and (110) surfaces of TeO2 crystal can be further observed. Finally, this paper obtained the peak figures of single crystal of TeO2 after XRD test.
Keywords: Tellurium dioxide; Micro-penetration hardness; Fracture toughness; Defects
目 录
第1章 绪论 1
1.1 引言 1
1.2 声光晶体 2
1.2.1 声光晶体及其应用 2
1.2.2 TeO2声光晶体 4
1.3 TeO2晶体研究现状 4
1.3.1 TeO2的晶体生长 4
1.3.2 TeO2晶体性能 5
1.4 晶体的力学性能 5
1.4.1 力学性能参数 8
1.4.2 声光晶体力学性能 8
1.5 课题的研究目的与意义 8
第2章 实验 9
2.1 晶体生长实验 9
2.2 样品制备（二氧化碲晶体的加工和处理） 10
2.3 XRD样品表征 12
2.4 晶体硬度测试 13
2.5 晶体断裂韧性测试 15
第3章 实验结果与讨论 17
3.1 显微压痕测试结果 17
3.1.1 二氧化碲晶体的实验数据记录 17
3.1.2 硬度实验数据处理与分析 18
3.2 断裂韧度测试结果 19
上一篇：表面感应熔敷焊耐磨层工艺试验研究
下一篇：聚氨酯硬泡阻燃性能研究+文献综述