【摘要】 为改善钛（Ti）的硬度和耐磨性，通过在纯钛（Ti）中引入TiB₂硬质相，基于放电等离子烧结（SPS）技术控制二者的反应进程，在Ti基体中构建出继承B元素扩散路径的TiB₂-TiB-Ti“硬核-强界面”组织结构。最终在TiB₂添加量40%时，获得了室温下863.5 HV5以及400℃下720.9 HV5的高硬度，其在相同摩擦条件下，室温至400℃温域内的摩擦性能皆优于商用TC4高温钛合金。与此同时，得益于优良的结合界面，该合金还展示出独特的高温高强韧特性，在400℃下仍保持了1120 MPa的高抗压强度与约11.7%的应变。本研究设计思路具有启发与普适性，有望为新型中高温高强韧耐磨钛合金材料的研发提供新方法，推动相关材料在航空航天领域的应用。更多还原

【Abstract】 To improve the hardness and wear resistance of titanium（Ti）, it is proposed to introduce TiB₂ hard phase into pure Ti to accurately control the reaction process of the two components based on the discharge plasma sintering（SPS） technique, and to construct a TiB₂-TiB-Ti “hardcore-strong-interface” structure in Ti matrix that inherits the diffusion path of B element. Finally, a high hardness of 863.5 HV5 at room temperature and 720.9 HV5 at 400 ℃ is obtained with the addition of 40% TiB₂, which makes its friction performance better than that of commercial TC4 high-temperature titanium alloys under the same friction conditions in the temperature range from room temperature to 400 ℃.At the same time, thanks to its excellent bonding interface, the alloy also exhibits unique high-temperature and high-toughness properties,maintaining a high compressive strength of 1120 MPa and strain of about 11.7% at 400 ℃. The design idea of this study is inspiring and universal,which is expected to provide a new method for the research and development of new medium-high-temperature and high-toughness wear-resistant titanium alloys, and to promote the application of related materials in aerospace field.更多还原