Low Thermal Expansion Modulated by Off-Stoichiometric Effect in Nonstoichiometric Laves Phase Hf0.87Ta0.13Fe2+x Compounds
文献类型：期刊论文
| 作者 | Li, LF; Tong, P; Tong, W; Jiang, WB; Ding, YW; Jin, H; Lin, JC; Yang, C; Zhu, F; Zhang, XK |
| 刊名 | INORGANIC CHEMISTRY
 |
| 出版日期 | 2019 |
| 卷号 | 58期号:24页码:16818-16822 |
| 关键词 | MAGNETIC-PROPERTIES INDUCED DISORDER MISMATCH STRESS LA(FE TRANSITION COMPOSITE SI |
| ISSN号 | 0020-1669 |
| DOI | 10.1021/acs.inorgchem.9b02989 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Materials with a low coefficient of thermal expansion (CTE) are extremely demanded in many fields, varying from microelectronics to space technology. Here we report a novel method to achieve low CTE, which differs essentially from the conventional way that uses additives with negative thermal expansion (NTE) to compensate for the positive CTE of the matrix. The stoichiometric Hf0.87Ta0.13Fe2+x (x = 0) shows a giant NTE, which is gradually suppressed with increasing x and finally changed to near-zero thermal expansion (ZTE) at x approximate to 0.4. The excess Fe was suggested to form anti-site defects by occupying the 4f sites. As revealed by electron spin resonance (ESR) spectra, the weakened NTE is closely related to a slower ferromagnetic (FM) ordering process than observed at x = 0. In addition, the CTE can be further tuned by introducing an extra alpha-Fe phase to achieve a low CTE (e.g., 3.3 ppm/K for x = 1.0) with markedly enhanced mechanical properties, beneficial to applications. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32119]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, High Field Magnet Lab, Anhui Prov Key Lab Condensed Matter Phys Extreme, Hefei 230031, Anhui, Peoples R China; 2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China; 3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 200120, Peoples R China 4.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Li, LF,Tong, P,Tong, W,et al. Low Thermal Expansion Modulated by Off-Stoichiometric Effect in Nonstoichiometric Laves Phase Hf0.87Ta0.13Fe2+x Compounds[J]. INORGANIC CHEMISTRY,2019,58(24):16818-16822. |
| APA | Li, LF.,Tong, P.,Tong, W.,Jiang, WB.,Ding, YW.,...&Sun, YP.(2019).Low Thermal Expansion Modulated by Off-Stoichiometric Effect in Nonstoichiometric Laves Phase Hf0.87Ta0.13Fe2+x Compounds.INORGANIC CHEMISTRY,58(24),16818-16822. |
| MLA | Li, LF,et al."Low Thermal Expansion Modulated by Off-Stoichiometric Effect in Nonstoichiometric Laves Phase Hf0.87Ta0.13Fe2+x Compounds".INORGANIC CHEMISTRY 58.24(2019):16818-16822. |
入库方式： OAI收割
来源：上海应用物理研究所
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