期刊
SCIENCE ADVANCES
卷 2, 期 7, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.1600319
关键词
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资金
- NSF [DMR-1506704, DMR-1157490]
- State of Florida
- U.S. Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division [DE-SC0008832]
- Turbomachinery Research Laboratory
- Florida State University Research Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1506704] Funding Source: National Science Foundation
The search for new hard materials is often challenging, but strongly motivated by the vast application potential such materials hold. Ti3Au exhibits high hardness values (about four times those of pure Ti and most steel alloys), reduced coefficient of friction and wear rates, and biocompatibility, all of which are optimal traits for orthopedic, dental, and prosthetic applications. In addition, the ability of this compound to adhere to ceramic parts can reduce both the weight and the cost of medical components. The fourfold increase in the hardness of Ti3Au compared to other Ti-Au alloys and compounds can be attributed to the elevated valence electron density, the reduced bond length, and the pseudogap formation. Understanding the origin of hardness in this intermetallic compound provides an avenue toward designing superior biocompatible, hard materials.
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