MICROHARDNESS AND STRUCTURAL RELAXATION IN AMORPHOUS Zr-Co AND Zr-Ni ALLOYS
by ZHANG Qirui (Department of Physics; University of Science and Technology of China; Hefei); FREYHARDT Herbert C. (Institut fur Metallphysik; Universitat Gottingen; FRG)
Cite this article:
by ZHANG Qirui (Department of Physics; University of Science and Technology of China; Hefei); FREYHARDT Herbert C. (Institut fur Metallphysik; Universitat Gottingen; FRG). MICROHARDNESS AND STRUCTURAL RELAXATION IN AMORPHOUS Zr-Co AND Zr-Ni ALLOYS. Acta Metall Sin, 1986, 22(4): 125-127.
Abstract The dependence of microhardness on the Co or Ni concentration has been measured for amorphous Zr_(100-x)M_x (M=Co, 22 x≤53.4; M=Ni, 24.1 x≤63.8) alloys. It is shown that the microhardness increases systematically upon increasing the concentration of Co or Ni. The effect of structural relaxation on the microhardness has been investigated for Zr_(78) Co_(22) and Zr_(75.9)Ni_(24.1). The microhardness exihibits a minimum and, then, increases slowly during isothermal annealing at 250℃. For isochronous annealing at differe nt temperature the microhardness increases very sharply when the crystallization temperature is approached. Complementary experimental results of DSC, resistivity, superconducting-critical-temperature and X-ray-diffraction measurements are used for an analysis of the phenomena occurring during structural relaxation and crystallization.
