Ultrafine microstructures make superhard materials harder

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2014,（9）
• 页码范围: 1183
• 页数: 1页
• 语种: 中文
• DOI: 10.1007/s11426-014-5185-9

摘要

As advanced tool materials,diamond and cubic boron nitride (cBN) play a vital role in the modem processing industry.Nonetheless,each material has some intrinsic drawbacks,such as the inferior thermal stability of diamond and the relatively low hardness and toughness of cBN.A simultaneous improvement in the hardness,toughness,and thermal stability of these materials has long been desired in the scientific and industry communities.The identification of a synthetic material that is harder than natural diamond has always been a human aspiration.After years of effort,however,scientists are becoming pessimistic about the realization of such a dream.For example,Chaudrhi et al.from the Cavendish Laboratory of Cambridge University claimed the following in his paper ritled,Harder than diamond? Just fiction (Nat Mater,2005,4:4).