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：

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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。