铁基非晶合金的表象激活能与玻璃转变、晶化、玻璃形成能力的关系  

Correlations Between Glass Transition,Crystallization,Apparent Activation Energy and Glass Forming Ability in Fe Based Amorphous Alloys

作　　者：姚斌[1] 张可[1] 

机构地区：[1]吉林大学物理学院,吉林长春130023

出　　处：《吉林师范大学学报（自然科学版）》2006年第3期1-4,共4页Journal of Jilin Normal University:Natural Science Edition

基　　金：国家自然科学基金(50472003);教育部博士点基金(20040183063);吉林大学创新基金资助

摘　　要：本文研究了Fe91-xBxZr5Nb4(FBZN,5≤x≤30 at.%)和Fe61-xCoxZr5B30Nb4(FCZBN,0≤x≤15at.%)非晶合金的玻璃转化,晶化,表象激活能,玻璃形成能力(GFA)以及它们之间的关系.研究表明,两合金体系中的每个成分非晶合金的玻璃转变温度Tg和晶化温度Tx均满足如下关系:Tx=(αTg+β,其中α和β为常数,其数值可利用差式扫描量热计,通过不同的升温速率变温扫描并应用Lasocka公式得到.玻璃转化表象激活能Eg正比于α,与Tx和Tg.的关系为:Eg=3.527(Tx-β)/Tg+1.09.表征GFA的过冷液化区,ΔTx,与Eg和Tg满足公式:ΔTx=(Eg/3.527-1.309)Tg+β.Glass transition,crystallization, apparent activation energy, and glass - forming ability （GFA） of a metallic glass as well as their correlations were studied in amorphous alloys of composition Fe91-xBxZr5Nb4 （FBZN,5≤ x ≤30 at. %） and Fe61- xCoxZr5B30Nb4（FCZBN,0≤x≤15 at. %）. It was found that the glass transition temperature Tg and crystallization temperature Tx can be related by a formula, Tx =α Tg ＋ β for each amorphous alloy in the two systems. The α and β are constants for a given amorphous alloy, measured by nonisothermal scan at various heating rates in a differential scanning calorimeter together with the Lasocka＇s equation. The apparent activation energy of glass transition Eg was observed to be directly proportional to cc and have a correlation, Eg = 3. 527（ Tx -β）/Tg ＋ 1 . 09, to Tx and Tg. Supercooled liquid region △ Tx, which is used as characterization of GFA, is related to Eg and Tg by a formula of △ Tx = （ Eg/3. 527 - 1. 309） Tg ＋β.

关 键 词：FE基非晶合金 晶化 玻璃形成能力 

分 类 号：O469[理学—凝聚态物理]