High Pressure Synthesis of Hard and Superhard Materials

这项工作涉及在高压下合成的共价键合硬/超硬材料的化学性质（1吉帕斯卡到大于70吉帕斯卡），但可以淬火到环境条件。这些实验将使用金刚石砧细胞技术以及最近开发的高压固体合成和表征方法进行。在极端压力和/或温度下的合成将与对硬材料形成和性质的详细现场观察相结合。主要研究方向为新型聚碳网络骨架聚合物合成金刚石和类金刚石材料，以及碳-氮和硼-氧体系合成新型硬材料。目标将是寻找新的硬材料，可能具有优于或补充现有材料的性能，并获得有关晶体结构，化学成分和硬度之间关系的新信息，这将有助于设计新的硬材料。＊＊＊

9314020 Badding This work is concerned with the chemistry of covalently bonded hard/superhard materials that are synthesized at high pressure (1 gigapascals to greater than 70 gigapascals), but can be quenched to ambient conditions. These experiments will be performed using diamond-anvil cell techniques together with recently developed methods for the synthesis and characterization of solids at high pressures. Syntheses at extreme pressures and/or temperatures will be combined with detailed in situ observations of the formation and properties of hard materials. The topics to be addressed are the synthesis of diamond and diamond-like materials from novel polycarbyne network-backbone polymers and the synthesis of new hard materials in the carbon-nitrogen and boron-oxygen systems. The goals will be to look for new hard materials, potentially with properties superior or complementary to existing ones and to gain new information about the relationship between crystal structure, chemical composition, and hardness that will help in the design of new hard materials. ***