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本文以Nb-Mo合金系为例,根据系统合金科学框架思想和BCC体系配位原子的情况,推出了适合BCC体系的合金特征原子浓度的计算公式,计算了B2-NbMo型有序合金的特征原子浓度随有序度s和成分xMo的变化,当合金有序度s=smax时,计量成分的B2-NbMo金属间化合物的特征原子浓度等于合金的成分,即x8Nb=0.5at.,x0Mo=0.5at.;随着有序度的降低,B2-NbMo型有序合金的特征原子A8Nb和A0Mo发生分裂,且随着有序度的降低,原子分裂的程度增大,由此可进行无序和各种不同有序合金的设计。
In this paper, taking the Nb-Mo alloy system as an example, according to the system framework theory of the alloy and the coordination atoms in the BCC system, the calculation formula for the characteristic atomic concentration of the alloy suitable for the BCC system is deduced. The characteristics of the B2-NbMo type ordered alloy When the degree of ordering s = smax, the characteristic atomic concentration of the B2-NbMo intermetallic compound is equal to the composition of the alloy, that is, x8Nb = 0.5at., X0Mo = 0.5at .; With the decreasing degree of order, B2-NbMo-type ordered alloy atoms A8Nb and A0Mo split, and as the degree of order decreases, the degree of atomic disruption increased, which can be disordered And a variety of different order alloy design.