Composites based on TiB2–SiC with a nickel–chromium matrix
Composites based on TiB2–SiC with a nickel–chromium matrix
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基于 TiB2-SiC 和镍铬基体的复合材料
DOI：
10.1007/s11106-012-9381-x
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发表时间：
2012
影响因子：
1
通讯作者：
A. Kostenko
中科院分区：
文献类型：
--
作者：
M. Storozhenko;A. P. Umanskii;V. Lavrenko;S. Chuprov;A. Kostenko
制备了以镍铬为基体的新型TiB2-SiC复合材料。对这些新型材料的热压工艺参数进行了优化，并对其结构和力学性能进行了研究。建立了复合材料的摩擦技术参数和磨损机理。磨损机理是在摩擦表面形成tio2 - b2o3 - sio2保护膜。结果表明，金属基体（ni - 20% Cr）的含量影响氧化膜的厚度，从而影响磨损率。含40%金属基的复合材料在摩擦表面形成最佳厚度（120 nm）的保护膜，具有较高的耐磨性。
New TiB2–SiC composite materials with a nickel–chromium matrix are obtained. The process parameters of hot pressing of these advanced materials are optimized and their structure and mechanical properties are studied. The tribotechnical parameters and wear mechanism of these composites are established. The wear mechanism consists in the formation of TiO2–B2O3–SiO2protective films on friction surfaces. It is shown that the amount of the metal matrix (Ni–20 % Cr) influences the thickness of oxide films and, hence, the wear rate. The composite with 40 % metal matrix has high wear resistance owing to the formation of a protective film with the optimal thickness (120 nm) on friction surface.