锆基非晶合金及其复合材料的非等温晶化动力学行为  

Non-isothermal Crystallization Ki netics of Zirconium-based Amorphous Alloys and Composites

作　　者：张震[1,2] 王金贺 李正坤 付华萌 杨红旺[1] 李宏[3] 朱正旺 张海峰 ZHANG Zhen;WANG Jinhe;LI Zhengkun;FU Huameng;YANG Hongwang;LI Hong;ZHU Zhengwang;ZHANG Haifeng(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China;Shichangxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Metallurgy,Northeastern University,Shenyang 110004,China)

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110870 [2]中国科学院金属研究所师昌绪先进材料创新中心,辽宁沈阳110016 [3]东北大学冶金学院,辽宁沈阳110004

出　　处：《铸造技术》2023年第8期763-770,共8页Foundry Technology

基　　金：中国载人航天工程(YYMT1201-EXP08)。

摘　　要：非晶合金及其复合材料受热时容易发生晶化转变,这显著影响其力学性能。因此需要对非晶合金及其复合材料晶化动力学行为进行研究,明确材料应用环境,并对材料应用过程中的组织状态进行定量分析,这对材料工程应用具有重要意义。本文采用差示扫描量热法研究(Zr_(40.08)Ti_(13.30)Cu_(11.84)Ni_(10.07)Be_(24.71))_(99)Nb_(1)非晶合金及W/(Zr_(40.08)Ti_(13.30)Cu_(11.84)Ni_(10.07)Be_(24.71))_(99)Nb_(1),非晶复合材料的非等温晶化动力学行为。结果显示,随着加热速率的增大,锆基非晶合金及其复合材料的T_(g)、T_(x1)、T_(p1)、T_(x2)和T_(p2)均向高温方向移动、过冷液相区△T不断加宽,二者的晶化转变和玻璃化转变均具有明显的动力学效应。分别采用Kissinger方程和Ozawa方程计算锆基非晶合金及其复合材料的激活能,两种方法计算的激活能数值的变化规律一致,但Ozawa方程计算的激活能数值更大。通过对比锆基非晶合金及其复合材料的激活能数值,可以得出非晶复合材料的抗晶化能力更高、热稳定性更强,并且根据Avrami指数n(x)可以得出非晶合金及其复合材料的晶化过程均由三维扩散长大模式进行。Amorphous alloys and their composites are prone to crystallization transformation when heated,which significantly affects their mechanical properties.Therefore,it is necessary to study the crystallization kinetic behavior of amorphous alloys and their composites,clarify the application environment of materials and quantitatively analyse the microstructure state in the application process of materials,which is of great significance for material engineering applications.In this paper,the non-isothermal crystallization kinetics of the(Zr_(40.08)Ti_(13.30)Cu_(11.84)Ni_(10.07)Be_(24.71))_(99)Nb_(1),amorphous alloy and W/(Zr_(40.08)Ti_(13.30)Cu_(11.84)Ni_(10.07)Be_(24.71))_(99)Nb_(1) amorphous composites were studied by differential scanning calorimetry(DSC).The results show that with increasing heating rate,the Tg、Txi、Tpi、T2 and Tp2 of Zr-based amorphous alloys and composites move to high temperatures,and the supercooled liquid region△T is continuously widened.The crystallization and glass transition of both have obvious kinetic effects.Kissinger and Ozawa equations were used to calculate the activation energy of Zr-based amorphous alloys and composites,respectively.The variation in the activation energy values calculated by the two methods is consistent,but the activation energy value calculated by the Ozawa equation is slightly larger.By comparing the activation energy values of Zr-based amorphous alloys and composites,it can be concluded that the amorphous composites have stronger crystallization resistance and thermal stability.The amorphous alloy and its composites are carried out by a three-dimensional diffusion growth mode according to the Avrami exponent n(x).

关 键 词：锆基非晶合金 非晶复合材料 非等温晶化 玻璃化转变 Avrami指数 

分 类 号：TG441.8[金属学及工艺—焊接]