Experimental investigation of isothermal section in the La-Ni-Si system at 1073 K

IF 4.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL Intermetallics Pub Date : 2025-04-01 Epub Date: 2025-01-30 DOI:10.1016/j.intermet.2025.108671

Tianlei Zhang , Kai Wang , Kailin Huang , Qingrong Yao , Zhao Lu , Qianxin Long , Jianqiu Deng , Jiang Wang , Huaiying Zhou

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Abstract

The isothermal section of the La-Ni-Si ternary system at 1073 K has been constructed in this work by using X-ray diffraction (XRD), and back-scattered electron (BSE) mode equipped with an electron probe microanalysis (EPMA). The 17 ternary compounds have been confirmed in the isothermal sections at 1073 K: LaNi_11.6–9.5Si_1.4–3.5, LaNi_8.8–8.4Si_4.2–4.6, LaNi_7.8–6.5Si_5.2–6.5, LaNi₂Si₂, LaNiSi₂, La₂NiSi₃, LaNiSi, La₁₄Ni₆Si₁₁, La₁₅Ni₄Si₁₃, LaNi₉Si₂, La₂NiSi, La₆Ni₂Si₃, LaNi₄Si, La₃Ni₃Si₂, La₂Ni₃Si₂, LaNi₂Si, and La₂(Ni,Si). This isothermal section also consists of 44 + 6 three-phase regions. At 1073K, the maximum solid solubility of Si in the (Ni) phase is about 10.28 at.%, the maximum solid solubility of Si in the (LaNi₅) phase is about 11.80 at.%, and the maximum solid solubility of Ni in the β-LaSi₂ phase is about 6.09 at.%. The present experimental results could be used as guidance to practical applications and input to future thermodynamic assessments.

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1073 K时La-Ni-Si体系等温截面的实验研究

本文利用x射线衍射（XRD）和背散射电子（BSE）模式，结合电子探针微分析（EPMA），建立了La-Ni-Si三元体系在1073 K时的等温截面。在1073 K等温切片中证实了17种三元化合物：LaNi11.6-9.5Si1.4-3.5, LaNi8.8-8.4Si4.2-4.6, LaNi7.8-6.5Si5.2-6.5, LaNi2Si2, LaNiSi2, La2NiSi3, LaNiSi, La14Ni6Si11, La15Ni4Si13, LaNi9Si2, La2NiSi, La6Ni2Si3, LaNi4Si, La3Ni3Si2, La2Ni3Si2, LaNi2Si, La2（Ni,Si）。等温剖面也由44 + 6三相区组成。在1073K时，Si在（Ni）相中的最大固溶度约为10.28 At。%时，Si在（LaNi5）相中的最大固溶度约为11.80 at。Ni在β-LaSi2相中的最大固溶度约为6.09 at.%。本实验结果可作为实际应用的指导，并为今后的热力学评价提供参考。

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.