Structure changes on relaxation of differently cooled Pd0.835Si0.165 alloy glass

Abstract

The radial distribution function (RDF) of X-ray diffraction was studied for liquid-quenched Pd0.835Si0.165 alloy glasses in relation to cooling conditions. The atomic distance (r1), total coordination number (n) and volume (V) are obtained by a first peak of RDF. The faster the cooling rate, the larger ther1,n andV become. Based on the relaxation theory, we show linear changes inr1,n andV with the sample thickness (D) which indicates the reciprocal cooling rate. log10(r1 − 2.826) = −1.92 − 2.58D log10 (12.83 −n) = 0.130 − 2.50D log10(V − 7.95) = 0.011 − 2.80D The volume change is mainly dominated byn.