Experimental study on phase relationships in the Si-rich portion of the Nb-Si-W ternary system
文献类型：期刊论文
| 作者 | Li, Y ; Li, CR ; Du, ZM ; Guo, CP ; Li, JB |
| 刊名 | CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
 |
| 出版日期 | 2013 |
| 卷号 | 41页码:60 |
| 关键词 | Nb-Si-W ternary system Liquidus projection Isothermal section Microstructure Solidification path |
| ISSN号 | 0364-5916 |
| 通讯作者 | Li, CR (reprint author), Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China. |
| 中文摘要 | This paper describes the experimental study on liquidus projection and the isothermal section at 1873 K of the Nb-Si-W ternary system in the Si-rich portion. The microstructures and solidification paths of the as-cast alloys were analysed. The constituent phases and their equilibrium compositions of the as-cast heat-treated alloys were determined. The microstructure observation, the phase identification and the composition measurement were performed using scanning electron microscopy (SEM), X-ray diffraction (XRD) and electron probe microanalysis (EPMA), respectively. No ternary compound was found. For the liquidus projection in the investigated Si-rich portion, there exist four primary solidification regions, Diamond-Si, beta(Nb,W)(5)Si-3, Nb(W)Si-2 and W(Nb)Si-2, and two eutectic invariant reactions, L ->beta(Nb,W)(5)Si-3 +W(Nb)Si-2+ Nb(W)Si2 and L -> W(Nb)Si-2+Nb(W)Si-2+ Diamond-Si. The type of the latter invariant reaction was determined with the help of the thermodynamic assessment of the system. Together with literature reported investigations for the Nb-W-rich portion, the whole liquidus projection of the Nb-Si-W ternary system was constructed. For the isothermal section at 1873 K in the investigated Si-rich portion, there are three three-phase regions, liquid + Nb(W)Si-2+W(Nb)Si-2, Nb(W)Si-2+alpha Nb(W)(5)Si-3+beta(Nb,W)(5)Si-3 and Nb(W)Si-2+W(Nb)Si-2+beta(Nb,W)(5)Si-3, and seven two-phase regions, liquid Nb(W)Si-2, Nb(W)Si-2+ alpha Nb(W)(5)Si-3, alpha Nb(W)(5)Si-3 + beta(Nb,W)(5)Si-3, Nb(W)Si-2+beta(Nb,W)(5)Si-3, liquid +W(Nb)Si-2, Nb(W)Si-2+W(Nb)Si-2 and W(Nb)Si-2+beta(Nb,W)(5)Si-3. (C) 2013 Elsevier Ltd. All rights reserved. |
| 资助信息 | National Natural Science Foundation of China [51271027, 50731002]; Ministry of Science and Technology of China [2005DKA32800] |
| 语种 | 英语 |
| 公开日期 | 2014-01-16 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/56989]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Li, Y,Li, CR,Du, ZM,et al. Experimental study on phase relationships in the Si-rich portion of the Nb-Si-W ternary system[J]. CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY,2013,41:60. |
| APA | Li, Y,Li, CR,Du, ZM,Guo, CP,&Li, JB.(2013).Experimental study on phase relationships in the Si-rich portion of the Nb-Si-W ternary system.CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY,41,60. |
| MLA | Li, Y,et al."Experimental study on phase relationships in the Si-rich portion of the Nb-Si-W ternary system".CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY 41(2013):60. |
入库方式： OAI收割
来源：物理研究所
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