过渡金属硼化物的结构与性质

发布时间：2018-06-23 09:53

本文选题：过渡金属硼化物 + 高温高压　；参考：《物理学报》2017年03期

【摘要】：过渡金属硼化物(TMBs)是一类具有强耐磨性、抗腐蚀性、耐高温、高硬度的多功能材料.过渡金属与硼原子间电荷转移量的多样性决定了过渡金属硼化物中化学键的成键方式和成键强弱,最终导致过渡金属硼化物丰富的结构以及潜在的多功能特性.过渡金属硼化物的制备、晶体结构和力学性能一直是该领域的研究热点.硼原子间的强共价键决定了过渡金属硼化物的合成需要高能量;晶体结构中化学键的强弱与过渡金属硼化物的硬度性质息息相关;多种化学键成键方式使过渡金属硼化物展现出了丰富的多功能性质.本文主要从过渡金属硼化物的合成、结构、硬度性质和多功能性质四个方面,以不同硼原子亚结构单元为出发点,总结和分析了过渡金属硼化物的研究现状.我们认为,利用高温高压制备TMBs,诱导过渡金属与硼原子之间的电子转移,构造(准)三维的化学键,是设计制备新型多功能硬质过渡金属硼化物的有效方法.
[Abstract]:Transition metal boride (TMBs) is a kind of multifunctional materials with high wear resistance, corrosion resistance, high temperature resistance and high hardness. The variety of charge transfer between transition metals and boron atoms determines the bonding mode and bonding strength of chemical bonds in transition metal boride, which leads to the rich structure and potential multifunctional properties of transition metal boride. The preparation, crystal structure and mechanical properties of transition metal boride have been the focus of research in this field. The strong covalent bond between the atoms of boron determines that the synthesis of transition metal boride needs high energy, and the strength of the chemical bond in the crystal structure is closely related to the hardness of the transition metal boride. The transition metal boride exhibits abundant multifunctional properties in various bonding modes. In this paper, the present research situation of transition metal boride is summarized and analyzed from four aspects: synthesis, structure, hardness and multifunctional properties of transition metal boride, with different substructural units of boron as the starting point. We consider that the preparation of TMBs at high temperature and pressure, the induction of electron transfer between transition metals and boron atoms, and the formation of (quasi-) three-dimensional chemical bonds are effective methods for the design and preparation of new multifunctional hard transition metal boride.
【作者单位】：吉林大学物理学院超硬材料国家重点实验室;
【基金】：国家自然科学基金(批准号:51032001,51172091,41572357)资助的课题~~
【分类号】：TB34

【相似文献】