| 二硼化钛的高温高压制备及其物性 |
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| 引用本文： | 黎军军,赵学坪,陶强,黄晓庆,朱品文,崔田,王欣. 二硼化钛的高温高压制备及其物性[J]. 物理学报, 2013, 62(2): 26202-026202. DOI: 10.7498/aps.62.026202 |
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| 作者姓名： | 黎军军 赵学坪 陶强 黄晓庆 朱品文 崔田 王欣 |
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| 作者单位： | 吉林大学超硬材料国家重点实验室,长春,130012 |
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| 基金项目： | 国家自然科学基金(批准号: 51172091, 51032001, 91022029)、国家基础科学人才培养基金(批准号: J1103202)和新世纪优秀人才支持计划资助的课题. |
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| 摘 要： | 以化学计量配比的Ti,B元素为原料,在高温高压条件下成功制备出颗粒均匀、致密性大于99％的二硼化钛(TiB2)体材料.物性测试结果表明:TiB2的维氏硬度高达39.6 GPa(接近超硬材料的40 GPa);并呈现出金属导电特性,电阻率在10-8 Ω.m的数量级(接近TiB2单晶样品值).TiB2的高硬度与金属特性,可能与该方法制备的TiB2体材料中均匀的细小晶粒尺寸有关.该方法为制备功能陶瓷材料提供了新的思路.
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| 关 键 词： | TiB2 高温高压 维氏硬度 |
| 收稿时间： | 2012-08-31 |
Characterization of TiB2 synthesized at high pressure and high temperature |
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| Li Jun-Jun,Zhao Xue-Ping,Tao Qiang,Huang Xiao-Qing,Zhu Pin-Wen,Cui Tian,Wang Xin. Characterization of TiB2 synthesized at high pressure and high temperature[J]. Acta Physica Sinica, 2013, 62(2): 26202-026202. DOI: 10.7498/aps.62.026202 |
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| Authors: | Li Jun-Jun Zhao Xue-Ping Tao Qiang Huang Xiao-Qing Zhu Pin-Wen Cui Tian Wang Xin |
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| Affiliation: | State key lab of superhard materials, Jilin University, Changchun 130012, China |
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| Abstract: | Bulk titanium borides (TiB2) have been successfully synthesized from the stoichiometric boron and titanium powders at high pressure and high temperature (HPHT). The density of TiB2 is higher than 99%. The Vicker's hardness of TiB2 as synthesized is 39.6 GPa which is near to result of the supehard materials. While TiB2 show good metallic characters with the resistivity, 10-8 Ωm, which is near to the value of the single crystal of TiB2. The enhanced properties of TiB2 as synthesized may be attributed to the higher density and uniform crystal size. |
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| Keywords: | titanium borides high pressure and high temperature vicker' s hardness |
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