超细纳米孪晶结构极硬立方氮化硼研究进展  

RESEARCH PROGRESS:ULTRAFINE NANOTWINNED ULTRAHARD CUBIC BORON NITRIDE

作　　者：田永君[1] 徐波[1] 于栋利[1] 

机构地区：[1]燕山大学亚稳材料制备技术与科学国家重点实验室,秦皇岛066004

出　　处：《中国科学基金》2013年第4期201-204,209,共5页Bulletin of National Natural Science Foundation of China

摘　　要：各向同性的多晶超硬材料广泛应用于机械加工、地质勘探、石油和天然气开采等相关行业,是国民经济发展的重要基础性工具材料。在简述多晶立方氮化硼超硬材料研究现状的基础上,本文详细介绍了超细纳米孪晶结构极硬立方氮化硼这一最新成果,包括形成超细纳米孪晶结构的新策略能够全面提高多晶立方氮化硼综合性能的基本原理、实施过程和实施效果,并对后续研究工作和此类极硬材料的工业化应用进行了讨论。Isotropic polycrystalline superhard materials as vital tool materials are widely used in the indus-tries of machining, geological exploration, oil and gas extraction, and are of essential importance to the de-velopment of national economy. Following a brief summary of the research status in superhard polycrystal-line cubic boron nitride （cBN） material, we report our latest achievements of ultrafine nanotwinned ultra-hard cBN. Fundamental principles for synergistic performance improvement in polycrystalline cBN through ultrafine nanotwinned structure are presented in detail along with the implementation pathway and product characterization. Follow-up researches on ultrahard materials with this strategy and the impact on industri-al applications are also discussed.

关 键 词：超硬材料 显微组织 硬化机制 

分 类 号：TB383.1[一般工业技术—材料科学与工程]