Characterization and Determination of Elastic Property of High-Density Nanocrystalline Gold Prepared by Gas-Deposition Method
Characterization and Determination of Elastic Property of High-Density Nanocrystalline Gold Prepared by Gas-Deposition Method
复制标题
DOI：
10.2320/matertrans.44.94
复制
发表时间：
2003
影响因子：
1.2
通讯作者：
H. Tanimoto;S. Sakai;E. Kita;H. Mizubayashi
中科院分区：
文献类型：
--
作者：
H. Tanimoto;S. Sakai;E. Kita;H. Mizubayashi
采用气相沉积法制备了密度为19400 ~ 200 kg/m3的纳米晶（n-）Au样品.由于n-Au颗粒在着陆后立即在样品表面发生重排，晶界能为（0：3 ~ 0：15）J/m2，与所报道的（p-）Au块体多晶的晶界能0.45 J/m2相当，空位型缺陷浓度在沉积态下约为15 ~ 10 ~ 4，随着晶粒的长大而减小。在10 K下观察到的杨氏模量几乎相同的条件下，施加到组成微晶的应力是所有的微晶之间相等，而应变是可变的估计。
Nanocrystalline (n-) Au specimens with the density of 19400 � 200 kg/m 3 were prepared by the gas deposition method. Since rearrangement of n-Au particles on the specimen surfaces takes place just after landing, the grain boundary energy of (0:3 � 0:15) J/m 2 is comparable with 0.45 J/m 2 reported for the bulk polycrystalline (p-) Au, and the concentration of vacancy type defects is about 15 � 10 � 4 in the as deposited state decreasing with the grain growth. The Young modulus observed at 10 K is almost the same to that estimated under the condition that stresses applied to the constituent crystallites are equal among all the crystallites while strains are variable.