| Co基非晶合金薄带的非等温晶化动力学效应 |
| |
| 引用本文： | 孙怀君,李莉,方允樟,斯剑霄,范晓珍,林根金.Co基非晶合金薄带的非等温晶化动力学效应[J].浙江师范大学学报(自然科学版),2012(1):53-58. |
| |
| 作者姓名： | 孙怀君 李莉 方允樟 斯剑霄 范晓珍 林根金 |
| |
| 作者单位： | 浙江师范大学数理与信息工程学院 |
| |
| 基金项目： | 国家自然科学基金资助项目(50871104);浙江省自然科学基金资助项目(Y1110563) |
| |
| 摘 要： | 采用非等温差示扫描量热法（DSC）研究了Co基非晶合金的晶化动力学.结果显示：随着升温速率的增加,特征温度Tg,Tx,Tp向高温区移动,且玻璃转变逐渐明显,过冷液相区逐渐加宽,表明该系列合金的玻璃化转变和晶化均具有动力学效应.用Kissinger方程计算了合金系的玻璃转变和晶化的表观激活能,发现与常规Co基非晶合金相比,具有强玻璃形成能力的Co基非晶合金的晶化激活能明显增大,由此说明该类非晶合金具有更高的非晶稳定性.
|
| 关 键 词： | Co基非晶 晶化动力学 晶化激活能 非晶稳定性 玻璃转变 |
Kinetic effects of nonisothermal crystallization of Co-based bulk amorphous alloy |
| |
| SUN Huaijun,LI Li,FANG Yunzhang,SI Jianxiao,FAN Xiaozheng,LIN Genjin.Kinetic effects of nonisothermal crystallization of Co-based bulk amorphous alloy[J].Journal of Zhejiang Normal University Natural Sciences,2012(1):53-58. |
| |
| Authors: | SUN Huaijun LI Li FANG Yunzhang SI Jianxiao FAN Xiaozheng LIN Genjin |
| |
| Institution: | (College of Mathematics,Physics and Information Engineering,Zhejiang Normal University,Jinhua Zhejiang 321004,China) |
| |
| Abstract: | The crystallization kinetics of the(Co0.89Fe0.057Nb0.053)100-x(B0.8Si0.2)x bulk amorphous alloy was investigated by differential scanning calorimetry(DSC) under nonisothermal conditions.The results showed that the characteristic temperatures(Tg,Tx,Tp) of(Co0.89Fe0.057Nb0.053)100-x(B0.8Si0.2)x shifted to higher ones with the increase of heating rate,and the supercooled liquid region was widened.Therefore,both the glass transition and crystallization of(Co0.89Fe0.057Nb0.053)100-x(B0.8Si0.2)x had kinetic effects.The activation energy of crystallization and glass transition of alloys were investigated by Kissinger equation.With the increase of B and Si elements in the alloy,the glass transition activation energy decreased,and the crystallization activation energy increased,which resulted in a higher stability of amorphous alloy. |
| |
| Keywords: | Co-based amorphous alloy crystallization kinetic crystallization activation energy amorphous stability glass transition |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
