时效对Ni-14.5Cr-1.5Si(wt%)合金某些性能的影响

THE EFFECT OF AGEING ON SOME PROPERTIES OF THE Ni-14.5Cr-1.5Si(wt%) ALLOY

本文研究了Ni-14.5Cr-1.5Si(wt%)合金淬火后时效发生的无序向有序转变对合金电阻率、对铂热电势、比热的影响。结果表明:电阻率显著增加,热电势、比热增加很小。X射线衍射分析表明,这是由于Ni_2Si化合物型δ第二相的形成所致。

The effect of ageing on resistivity, thermoelectromotive power vs Pt and specific heat of the Ni-14.5Cr-1.5Si(wt%) alloy was studied. After quenching, this alloy experiences a transformation from disorder to short range order. Results showed that the resistivity inereased signifitantly by ageing, but the thermoelectromotive power and specific heat increased only slightly. X-ray diffraction analysis showed that this is caused by the formation of the 6-second phase, which is a Ni_2Si compound.