EVIDENCE FOR THE SUPERMODULUS EFFECT AND ENHANCED HARDNESS IN METALLIC SUPERLATTICES

被引:59
作者
FARTASH, A
FULLERTON, EE
SCHULLER, IK
BOBBIN, SE
WAGNER, JW
CAMMARATA, RC
KUMAR, S
GRIMSDITCH, M
机构
[1] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439
[2] JOHNS HOPKINS UNIV,BALTIMORE,MD 21218
来源
PHYSICAL REVIEW B | 1991年 / 44卷 / 24期
关键词
D O I
10.1103/PhysRevB.44.13760
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A study of the mechanical properties of Cu/Nb superlattices shows that for modulation wavelengths below approximately 50 angstrom the biaxial modulus increases by approximately 15%, the shear modulus decreases by approximately 30%, and the flexural modulus does not change. These observations show that anomalies with different signs for elastic moduli can coexist in the same material. Measurements performed on both supported and unsupported films show that the anomalous effects are not induced by the presence of a substrate. The superlattices are also found to have a hardness larger than either Cu or Nb.
引用
收藏
页码:13760 / 13763
页数:4
相关论文
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