预退火时间与Fe_(68)Ni_1Al_5Ga_2P_(9.65)B_(4.6)Si_3C_(6.75)玻璃转变热力学参数的关系  

Effect of Pre-annealing Time on Thermodynamic Parameters of Fe_(68)Ni_1Al_5Ga_2P_(9.65)B_(4.6)Si_3C_(6.75) Alloy in Glass Transition

作　　者：傅明喜[1] 熊震东[1] 黄军庆[1] 

机构地区：[1]江苏大学,江苏镇江212013

出　　处：《稀有金属材料与工程》2011年第12期2171-2174,共4页Rare Metal Materials and Engineering

基　　金：国家"863"研究项目(2007AA03Z548);江苏省高技术研究项目(BG2007030);江苏省教育厅高校科学研究项目(03KJD430067)

摘　　要：采用DSC、XRD检测方法,分析了经673K((Tg-100K)<T<Tg)不同时间(20,40,60min)预退火处理后,Fe68Ni1Al5Ga2P9.65B4.6Si3C6.75非晶合金的玻璃转变温度Tg、起始晶化温度Tx、晶化峰温度Tp、玻璃转变过程中的比热容增量△Cp,g的变化以及经823K晶化反应后的XRD图谱。结果表明:Fe68Ni1Al5Ga2P9.65B4.6Si3C6.75非晶合金的玻璃转变温度Tg和比热容增量△Cp,g随预退火时间的延长而逐步增加;起始晶化温度Tx和第一晶化峰温度Tp1随预退火时间呈现出逐渐减小的趋势;其晶化后样品衍射峰形貌相似,衍射峰的强度略有不同。利用结构弛豫理论对实验结果进行了分析。DSC and XRD detection methods were used to investigate glass transition （Tx）, crystallization peak temperature （Tp）, and specific heat difference temperature （Tg）, （△ Cp.g） during onset crystallization temperature glass transition period of Fe68Ni1Al5Ga2P9.65B4.6Si3C6.75amorphous alloys, which were pre-annealed at 673 K （（Tg-100 K）〈T〈Tg） for different time （20, 40, and 60 min）, and XRD patterns of as-quenched and pre-annealed samples after undergoing 823 K crystallization were also analyzed. Results indicate that the glass transition temperature and the specific heat difference gradually increase with prolonging of annealing temperature, while the onset crystallization temperature and the first crystallization peak temperature show a trend of gradual decrease. Besides, the XRD patterns indicate that diffraction peaks of the as-quenched and the per-annealed samples after undergoing 823 K crystallization are similar, while the intensity of diffraction peaks has some slight differences. The research results were further analyzed in terms of structural relaxation theory

关 键 词：预退火 结构弛豫 玻璃转变 热力学参数 

分 类 号：TG139.8[一般工业技术—材料科学与工程]