Effect of Ni on the formation and thermal behavior of NdAlCo metallic glasses  

作　　者：Yanxin ZHUANG Jun CHEN Puwei WANG JichengHE 

机构地区：[1]Key Laboratory of Electromagnetic Processing of Materials (Ministry of EdUcation), NortheasternUniversity, Shenyang 110819, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2011年第4期281-286,共6页金属学报（英文版）

基　　金：supported by the SRF for ROCS(State Education Ministry);the Fundamental Research Funds for the Central University,P.R.China(Grant Nos.N100409001 and N090209001)

摘　　要：Nd60All0Co30-xNix （x=0, 5, 10 and 15 at. pct） metallic glasses have been prepared using single-spinner and suck-casting method, and characterized using X-ray diffrac- tion （XRD） and non-isothermal differential scanning calorimetric technique. It has been found that the Mloy with 15 at. pct Ni has the strongest glass forming ability, and can be fabricated to a rod with 5 mm in diameter using suck-casting. The addition of Ni has an obvious effect on the thermal behavior of the metallic glasses, especially on the position of the second and third crystallization peaks. The crystallization ki- netics and activation energies of the four metallic glasses have been elaborated using the Kissinger equation. The continuous heating transformation curves of the T~ and Tpl have been constructed by applying the extension of the Vogel-Fulcher-Tammann （VFT） nonlinear equations, which are derived from the experimental data in the heat- ing rate range of 5-80 K/min. The effect of Ni on the formation and thermal stability of the Nd-based metallic glasses has been discussed.Nd60All0Co30-xNix （x=0, 5, 10 and 15 at. pct） metallic glasses have been prepared using single-spinner and suck-casting method, and characterized using X-ray diffrac- tion （XRD） and non-isothermal differential scanning calorimetric technique. It has been found that the Mloy with 15 at. pct Ni has the strongest glass forming ability, and can be fabricated to a rod with 5 mm in diameter using suck-casting. The addition of Ni has an obvious effect on the thermal behavior of the metallic glasses, especially on the position of the second and third crystallization peaks. The crystallization ki- netics and activation energies of the four metallic glasses have been elaborated using the Kissinger equation. The continuous heating transformation curves of the T~ and Tpl have been constructed by applying the extension of the Vogel-Fulcher-Tammann （VFT） nonlinear equations, which are derived from the experimental data in the heat- ing rate range of 5-80 K/min. The effect of Ni on the formation and thermal stability of the Nd-based metallic glasses has been discussed.

关 键 词：Nd-based metallic glass NICKEL Glass forming ability THERMALSTABILITY 

分 类 号：O633.14[理学—高分子化学] TG139.8[理学—化学]