Crystallization behavior of
Ti61.67Zr17.15Ni14.80Cu6.38glass-forming alloy①
Ti61.67Zr17.15Ni14.80Cu6.38glass-forming alloy①
(1. Beijing General Research Institute for Non-ferrous Metals, Beijing 100088, China;
2. Institute of Precious Metals, Kunming 650221, China;
3. Guangxi Institute of Mechanical & Electrical Technology, Nanning 530007, China)
2. Institute of Precious Metals, Kunming 650221, China;
3. Guangxi Institute of Mechanical & Electrical Technology, Nanning 530007, China)
Abstract: Ti61.67Zr17.15Ni14.80Cu6.38(atom fraction, %) metallic glass has applications in brazing. Using the hammer-and-anvil technique, Ti61.67Zr17.15Ni14.80Cu6.38metallic glass was prepared. The crystallization behavior for this metallic glass was investigated by differential scanning calorimetry(DSC), X-ray diffractometry(XRD) and transmission electron microscopy(TEM). There are three stages in DSC curves of crystallization. The reduced glass temperatureTrgis 0.42. The kinetic parameters of crystallization were calculated by a set of equations of the maximum crystallization rate. The crystalline phase formed in the MSI(Metastable stage I) is Zr2Cu, in the MSII isα-Ti and in the MSIII is Ti2Ni. This kind of alloy has lower glass forming ability, and the Ti61.67Zr17.15Ni14.80Cu6.38metallic glass has lower thermal stability.
Key words: Ti61.67Zr17.15Ni14.80Cu6.38metallic glass; crystallization behavior; glass forming ability; brazing