Abstract

The Ti₅Si₃С_х-based composites containing 10 vol % Ti₂AlC, which are prepared by mechanical alloying of Ti, Si, and Al powders in a liquid hydrocarbon and subsequent heat treatment, are studied. The carbosilicide phase is found to form based on a silicide already at the mechanical alloying stage, whereas Ti₂AlC forms during subsequent heat treatment. It is shown that, at 1300°С, the sintering of a sample takes place, which results in the formation of a porous (~13%) composite with a density of 3.75 ± 0.01 g/cm³ and a hardness of 10 ± 1 GPa. The dry friction coefficient of the composite, which is determined upon frictional tests with the WC/6Co alloy counterbody, is ~0.55.

中文翻译：

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机械合成的 Ti5Si3Сх/Ti2AlC 复合材料：相分析、微观结构和性能

摘要

_研究了含有 10 vol% Ti ₂ AlC的 Ti ₅ Si ₃ Сх基复合材料，该复合材料是通过将 Ti、Si 和 Al 粉末在液态烃中进行机械合金化并随后进行热处理而制备的。发现碳硅化物相基于已经在机械合金化阶段的硅化物形成，而Ti ₂ AlC 在随后的热处理过程中形成。结果表明，在 1300°С 时，样品发生烧结，导致形成密度为 3.75 ± 0.01 g/cm ³和硬度为 10 ± 1的多孔 (~13%) 复合材料帕。复合材料的干摩擦系数是通过 WC/6Co 合金对体的摩擦试验确定的，约为 0.55。