Preparation and crystallization of Ti53Cu27Ni12Zr3Al7Si3B1 bulk metallic glass with wide supercooled liquid region
Preparation and crystallization of Ti53Cu27Ni12Zr3Al7Si3B1 bulk metallic glass with wide supercooled liquid region
复制标题
宽过冷液相区Ti53Cu27Ni12Zr3Al7Si3B1大块金属玻璃的制备与晶化
DOI：
10.1016/j.msea.2004.08.019
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发表时间：
2005
期刊：
影响因子：
6.4
通讯作者：
Jianguo Li
中科院分区：
文献类型：
--
作者：
Mingxu Xia;Chao;Hongxing Zheng;Jianguo Li
采用铜模铸造法制备了成分为Ti 53 Cu 27 Ni 12 Zr 3Al 7Si 3B 1的Ti基大块非晶合金，并与快淬薄带试样进行了对比。用差示扫描量热法（DSC）和差热分析（DTA）研究了该玻璃相的热不稳定性。结果表明，该合金的过冷液相区（ΔTx）、玻璃化转变温度（Tg）和约化玻璃化转变温度（Tg/Tm）分别为69、685和0.62K。还通过在高于Tg的系列温度下退火玻璃相来研究Ti基玻璃相的结晶行为。通过X射线衍射实验检查退火的显微组织。BMG的结晶过程可以通过在第一结晶步骤的亚稳结晶相和在高温下通过亚稳结晶相进一步过渡到稳定结晶相来表征。
Ti-based bulk metallic glass (BMG) alloy with the composition of Ti53Cu27Ni12Zr3Al7Si3B1was prepared by copper molder casting method and ribbon sample was prepared by melt spinning to compare. The thermal instability of this glass phase was examined by using differential scanning calorimetry (DSC) and differential thermal analysis (DTA). The results revealed that the supercooled liquid region (ΔTx), glass transition temperature (Tg) and reduced glass transition temperature (Tg/Tm) of the glassy alloy are detected to be 69, 685 and 0.62K, respectively. The crystallization behavior of the Ti-based glass phase was also investigated by annealing the glass phase at series temperatures above Tg. The annealed microstructures were examined by means of X-ray diffraction experiments. The crystallization process of the BMG can be characterized by metastable crystalline phases at the first crystallization step and further transition to stable crystalline phases at high temperature through metastable crystalline phase.