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Mechanical and wear properties of Si3N4 reinforced titanium composites
Indian Journal of Engineering & Materials Sciences Pub Date : 2021-02-05
Tugba Mutuk, Mevlüt Gürbüz

In the present study, Si3N4 reinforced titanium composites have been produced by the powder metallurgy method. The effect of various percentages of Si3N4 (0-9 wt. %) on the microstructure, density, hardness and compressive strength of titanium (It) composites have been investigated. After sintering at 1100 oC for 120 min., the mechanical properties have been significantly developed up to 3 wt. % Si3N4. The highest hardness and the greatest compressive strength have been obtained for 3 wt. % Si3N4 reinforced composite (698.5 HV and 1093 MPa) when compared to pure titanium (414.2 HV and 826 MPa). Si3N4 addition improved the wear properties of composites when compared to pure titanium. The lowest wear rate (1.36 x 10-5, 2.75 x 10-5 and 5.15 x 10-5 mm3 / Nm for 10 N, 20 N and 30 N, respectively) have been obtained for 3 wt. % Si3N4 reinforced titanium composite. Above this ratio, the properties of composites have deteriorated due to agglomeration tendency of Si3N4 powder. The scanning electron image, elemental mapping and line analyses confirm the uniform distribution of Si3N4 powder in Ti matrix. There has been no in-situ formed second phase of composite structure from the X-ray diffraction analyses.

中文翻译:

Si3N4增强钛复合材料的机械和磨损性能

在本研究中,通过粉末冶金法制备了Si 3 N 4增强钛复合材料。研究了各种百分比的Si 3 N 4(0-9 wt。%)对钛(It)复合材料的微观结构,密度,硬度和抗压强度的影响。在1100 o C烧结120分钟后,机械性能已显着提高到3 wt。%。%Si 3 N 4。对于3重量%,已经获得最高的硬度和最大的抗压强度。与纯钛(414.2 HV和826 MPa)相比,%Si 3 N 4增强复合材料(698.5 HV和1093 MPa)。硅与纯钛相比,添加3 N 4可以改善复合材料的磨损性能。最低的磨损率(1.36×10 -5,2.75×10 -5和5.15×10 -5毫米3已经获得了3重量/ Nm,用于10 N,20 N和30 N,分别地)。Si 3 N 4增强钛复合材料。高于该比率,由于Si 3 N 4粉末的附聚趋势,复合材料的性能劣化。扫描电子图像,元素映射和线分析证实了Si 3 N 4粉末在Ti基体中的均匀分布。没有就地 通过X射线衍射分析得出复合结构的第二相。
更新日期:2021-02-05
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