稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2003年
11期
880-884
,共5页
钛基非晶合金%玻璃形成能力%过冷液态区%铜模铸造法
鈦基非晶閤金%玻璃形成能力%過冷液態區%銅模鑄造法
태기비정합금%파리형성능력%과랭액태구%동모주조법
titanium-based amorphous alloy%glass-forming ability%supercooled liquid region%copper mold casting
利用旋转铜辊急冷法和铜模铸造法制备非晶合金薄带或圆棒,并采用X衍射仪(XRD)、差示扫描量热仪(DSC)和差示热分析仪(DTA)研究了Ta,Nb和Mo对Ti50Ni20Cu25Sn5非晶合金玻璃形成能力(GFA)的影响.结果表明,Ta的添加提高了Ti50Ni20Cu25Sn5合金的GFA,Mo的添加降低了该合金的GFA,Nb的添加则对该合金的GFA没有明显的影响;含Ta合金具有超过60 K的宽过冷液态区(△Tx),且其约化玻璃转变温度因子(Tg/Tm)大于含Nb合金和含Mo合金;采用常规铜模铸造法制备出了直径为1mm的(Ti0.5Ni0.2Cu0.25Sn0.05)98Ta2和(Ti0.5Ni0.2Cu0.25Sn0.05)96Ta4块状非晶圆棒;(Ti0.5Ni0.2Cu0.25Sn0.05)98Ta2块状非晶圆棒的Tg,△Tx和Tg/Tm分别为678 K,84 K和0.60,而(Ti0.5Ni0.2Cu0.25Sn0.05)96Ta4块状非晶圆棒的Tg,△Tx和Tg/Tm分别为680 K,70 K和0.60.
利用鏇轉銅輥急冷法和銅模鑄造法製備非晶閤金薄帶或圓棒,併採用X衍射儀(XRD)、差示掃描量熱儀(DSC)和差示熱分析儀(DTA)研究瞭Ta,Nb和Mo對Ti50Ni20Cu25Sn5非晶閤金玻璃形成能力(GFA)的影響.結果錶明,Ta的添加提高瞭Ti50Ni20Cu25Sn5閤金的GFA,Mo的添加降低瞭該閤金的GFA,Nb的添加則對該閤金的GFA沒有明顯的影響;含Ta閤金具有超過60 K的寬過冷液態區(△Tx),且其約化玻璃轉變溫度因子(Tg/Tm)大于含Nb閤金和含Mo閤金;採用常規銅模鑄造法製備齣瞭直徑為1mm的(Ti0.5Ni0.2Cu0.25Sn0.05)98Ta2和(Ti0.5Ni0.2Cu0.25Sn0.05)96Ta4塊狀非晶圓棒;(Ti0.5Ni0.2Cu0.25Sn0.05)98Ta2塊狀非晶圓棒的Tg,△Tx和Tg/Tm分彆為678 K,84 K和0.60,而(Ti0.5Ni0.2Cu0.25Sn0.05)96Ta4塊狀非晶圓棒的Tg,△Tx和Tg/Tm分彆為680 K,70 K和0.60.
이용선전동곤급랭법화동모주조법제비비정합금박대혹원봉,병채용X연사의(XRD)、차시소묘량열의(DSC)화차시열분석의(DTA)연구료Ta,Nb화Mo대Ti50Ni20Cu25Sn5비정합금파리형성능력(GFA)적영향.결과표명,Ta적첨가제고료Ti50Ni20Cu25Sn5합금적GFA,Mo적첨가강저료해합금적GFA,Nb적첨가칙대해합금적GFA몰유명현적영향;함Ta합금구유초과60 K적관과랭액태구(△Tx),차기약화파리전변온도인자(Tg/Tm)대우함Nb합금화함Mo합금;채용상규동모주조법제비출료직경위1mm적(Ti0.5Ni0.2Cu0.25Sn0.05)98Ta2화(Ti0.5Ni0.2Cu0.25Sn0.05)96Ta4괴상비정원봉;(Ti0.5Ni0.2Cu0.25Sn0.05)98Ta2괴상비정원봉적Tg,△Tx화Tg/Tm분별위678 K,84 K화0.60,이(Ti0.5Ni0.2Cu0.25Sn0.05)96Ta4괴상비정원봉적Tg,△Tx화Tg/Tm분별위680 K,70 K화0.60.
Effects of Ta, Nb and Mo additions on the glass-forming ability (GFA) of the Ti5oNi20Cu25Sn5 alloy were studied by melt-spinning and copper mold casting methods. X-ray diffraction (XRD), differential scanning calorimetry (DSC) and differential thermal analysis (DTA) . The results show that the GFA is improved by Ta additions and decreased by Mo additions. No obvious improvement is observed in Nb-added alloys. The Ta-added alloys exhibit a wide supercooled liquid region exceeding 60 K before crystallization. The reduced glass transition temperature (Tg/Tm) of the Ta-added alloys is higher than those of the Nb- and Mo-added alloys. Cylindrical rods of 1 mm in diameter containing fully glassy phase were successfully synthesized for(Ti0.5Ni0. 2Cu0. 25Sn0.05) 98Ta2 and (Ti0. 5Ni0. 2Cu0. 28Sn0. 08) 96Ta4 by conventional copper mold casting. The Tg, △ Tx and Tg/Tm of the bulk glassy rod are 678 K, 84 K and 0. 60 for (Ti0. 5Ni0.2Cu0.25Sn0. 05) 98Ta2 alloy, and are 680 K, 70 K and 0.60 for(Ti0. 5Ni0.2Cu0. 25Sn0. 05 )96Ta4 alloy respectively.
