Effect of peening on structure and volume in a liquid-quenchedPd0.835Si0.165glass

The radial distribution function (RDF) for x-ray diffraction has been studied for liquid-quenched ${\mathrm{Pd}}_{0.835}$ ${\mathrm{Si}}_{0.165}$ alloy glasses in relation to peening time. The molar volume (V) is obtained from the first peak of the RDF. The longer the peening time, the larger the V (${\mathrm{cm}}^3$/mol) becomes. Based on the rate process, we show a linear relationship between V and the peening time (t, expressed in s): [($V_s$-V)/($V_s$-$V_0$)]=1-exp(-kt${)}^n$. Here n and k are constants. $V_s$ and $V_0$ are the volumes of liquid-quenched ${\mathrm{Pd}}_{0.835}$ ${\mathrm{Si}}_{0.165}$ alloy glasses, which are peened for an extremely long period and for 0 s, respectively. $V_s$ agrees with the extrapolated volume of the ${\mathrm{Pd}}_{0.835}$ ${\mathrm{Si}}_{0.165}$ alloy liquid above the melting point.