新型纳米结构超硬材料的高压合成和表征数据集

实验制备出新型纳米孪晶碳化硼和非晶四面体碳，采用透射电镜、X射线衍射仪等表征了其微观组织结构，压痕实验测定二者的硬度值分别为42.6 GPa和113 GPa；以氢化纳米洋葱碳为前驱体，促进了纳米碳材料向金刚石的转变，在接近工业化生产的条件合成出透明纳米聚晶金刚石（硬度140.0 GPa）；以金刚石和碳化硼为原料，高温高压合成出不同硼浓度的、比金刚石热稳定性更优异的超硬超导多晶掺硼金刚石材料（硬度78.5 GPa）；利用“金刚石纳米高压舱”实现高压态物质的常压保存。In this study, novel nanotwinned boron carbide and amorphous tetrahedral carbon were successfully synthesized. Their microstructures were characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD) and other analytical techniques. Vickers indentation tests determined that their hardness values were 42.6 GPa and 113 GPa, respectively. Using hydrogenated nanoscaled onion-like carbon as a precursor, the phase transformation from nanocarbon materials to diamond was facilitated, and transparent nanopolycrystalline diamond (with a hardness of 140.0 GPa) was synthesized under conditions close to industrial production scales. Using diamond and boron carbide as starting materials, superhard superconducting polycrystalline boron-doped diamond materials with varying boron concentrations were synthesized via high-temperature and high-pressure (HPHT) methods. These materials demonstrated better thermal stability than pure diamond, with a hardness of 78.5 GPa. The "diamond nanocapsule" was utilized to achieve ambient-pressure preservation of high-pressure phase substances.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于新型纳米结构超硬材料，通过高压合成方法制备了纳米孪晶碳化硼、非晶四面体碳、透明纳米聚晶金刚石和掺硼金刚石等多种材料，并利用透射电镜、X射线衍射仪和压痕实验等手段表征了其微观组织结构和硬度性能。