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Ho-Ir-O三元体系在1073 K时相平衡的实验研究

Experimental Investigation of Phase Equilibria of the Ho-Ir-O Ternary System at 1073 K.

作者信息

Homolová Viera, Čiripová Lucia, Zobač Ondřej, Zemanová Adéla, Falat Ladislav

机构信息

Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia.

Institute of Physics of Materials, Czech Academy of Sciences, Žižkova 22, 616 62 Brno, Czech Republic.

出版信息

Materials (Basel). 2023 Aug 1;16(15):5406. doi: 10.3390/ma16155406.

DOI:10.3390/ma16155406
PMID:37570110
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10419622/
Abstract

An experimental study of the phase equilibria of the Ho-rich part of the Ho-Ir-O ternary system at 1073 K by means of x-ray diffraction, differential scanning calorimetry, and scanning electron microscopy has been carried out. Ho-hcp and four binary compounds, namely HoIr, HoIr, HoIr, and HoO, were identified in the Ho-Ir-O model alloys after long-term annealing (350-1220 h). No solubility of iridium in HoO oxide and Ho-hcp was observed. No ternary phase was found. Based on the experimental results, an isothermal section of the Ho-rich part of the Ho-Ir-O system at 1073 K was constructed. In addition, the microstructure of as-cast alloys was studied. An irregular eutectic consisting of faceted Ho-phase in HoIr phase was observed in the alloys with Ho-hcp + HoIr + HoO phase composition, and the temperature of the eutectic reaction Ho-hcp + HoIr ↔ liquid was determined.

摘要

通过X射线衍射、差示扫描量热法和扫描电子显微镜对Ho-Ir-O三元系富Ho部分在1073 K下的相平衡进行了实验研究。经过长时间退火（350 - 1220小时）后，在Ho-Ir-O模型合金中鉴定出了Ho-hcp和四种二元化合物，即HoIr、HoIr、HoIr和HoO。未观察到铱在HoO氧化物和Ho-hcp中的溶解度。未发现三元相。基于实验结果，构建了Ho-Ir-O体系富Ho部分在1073 K时的等温截面。此外，还研究了铸态合金的微观结构。在具有Ho-hcp + HoIr + HoO相组成的合金中观察到由HoIr相中的小面Ho相组成的不规则共晶，并确定了共晶反应Ho-hcp + HoIr ↔ 液相的温度。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/3e4157f78db1/materials-16-05406-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/800c52e264ff/materials-16-05406-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/09de321f3881/materials-16-05406-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/0621ba5849d1/materials-16-05406-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/f25145d6ffe7/materials-16-05406-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/3b730210d25d/materials-16-05406-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/3e4157f78db1/materials-16-05406-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/800c52e264ff/materials-16-05406-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/09de321f3881/materials-16-05406-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/0621ba5849d1/materials-16-05406-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/f25145d6ffe7/materials-16-05406-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/3b730210d25d/materials-16-05406-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4676/10419622/3e4157f78db1/materials-16-05406-g006.jpg

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