Mechanically induced phase transformation in the Nb<sub>3</sub>Au intermetallic compound
作者:L M Di、H Bakker
DOI:10.1088/0953-8984/3/47/005
日期:1991.11.25
The A15 intermetalliccompoundNb3Au was subjected to grinding in a high-energy ball mill. A phasetransformation from the A15 phase to the high-temperature BCC solid solution of gold in niobium was observed after milling. Differential scanning calorimetry revealed an exothermic peak with a heat content of 4.6 kJ mol-1. The activation energy was 435 kJ mol-1. The present result is very similar to the
Annealing samples of the superconducting compound Nb<sub>3</sub>Au with thermally induced disorder
作者:D M R Lo Cascio、P I Loeff、H Bakker
DOI:10.1088/0953-8984/4/36/017
日期:1992.9.7
To investigate the kinetics of recovery of antisite disorder in the A15 compoundNb3Au, isochronal and isothermal annealing procedures at intermediate temperatures (between 833 and 1043 K) were performed on grains quenched from 1355(1) K. From these experiments, the vacancy migration enthalpy, and its pre-exponential factor were determined as 0.39 eV, and 2.7*102 s, respectively. The atomic-migration
为了研究 A15 化合物 Nb3Au 中反位点无序恢复的动力学,对从 1355(1) K 淬火的晶粒在中间温度(833 和 1043 K 之间)进行等时和等温退火程序。从这些实验中,空位迁移焓,其指数前因子分别确定为 0.39 eV 和 2.7*102 s。发现原子迁移焓及其指前因子分别为 1.43 eV 和 7.1*10-2 s。这些值与 A15 化合物 V3Ga 和 Ca3Rh4Sn13(具有 A15 亚结构的超导体)的数据以及球磨 Nb3Au 的数据进行了比较。