V. Venkata Trinadh , P. Manikandan , Suranjan Bera , C.V.S. Brahmananda Rao
{"title":"利用高温质谱法对铀-硒体系的蒸发热力学和双相区进行研究","authors":"V. Venkata Trinadh , P. Manikandan , Suranjan Bera , C.V.S. Brahmananda Rao","doi":"10.1016/j.calphad.2024.102751","DOIUrl":null,"url":null,"abstract":"<div><div>High-temperature vaporisation thermodynamic studies over <U<sub>3</sub>Sn<sub>7</sub>(cr) + USn<sub>2</sub>(cr)> and <USn<sub>2</sub>(cr) + USn(cr)> two-phase regions were carried out by employing Knudsen Effusion Mass Spectrometry (KEMS) in the temperature range 1148–1465 and 1222–1471 K, respectively. Sn(g) was the only species observed in the mass spectra of the equilibrium vapour phase over both the biphasic regions. The partial pressure-temperature relations of Sn(g) were deduced as</div><div>log(p<sub>Sn</sub>/Pa) = (−15,737 ± 73)/(T/K)) + (9.52 ± 0.06) (1148–1465 K) <U<sub>3</sub>Sn<sub>7</sub>(cr) + USn<sub>2</sub>(cr)> and</div><div>log(p<sub>Sn</sub>/Pa) = (−16,151 ± 67)/(T/K)) + (9.70 ± 0.05) (1222–1471 K) <USn<sub>2</sub>(cr) + USn(cr)></div><div>Using p-T relations, the enthalpies of the following heterogeneous reaction equilibria were evaluated by the second law method: U<sub>3</sub>Sn<sub>7</sub>(cr) = 3USn<sub>2</sub>(cr) + Sn(g) and USn<sub>2</sub>(cr) = USn(cr) + Sn(g). Subsequently, the Gibbs energies of the formation of U<sub>3</sub>Sn<sub>7</sub>(cr) and USn<sub>2</sub>(cr) were derived. Knudsen effusion mass spectrometric studies over these two biphasic regions are being reported for the first time.</div></div>","PeriodicalId":9436,"journal":{"name":"Calphad-computer Coupling of Phase Diagrams and Thermochemistry","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Vaporisation thermodynamic studies over <U3Sn7(cr) + USn2(cr)> and <USn2(cr) + USn(cr)> biphasic regions of U-Sn system using high temperature mass spectrometry\",\"authors\":\"V. Venkata Trinadh , P. Manikandan , Suranjan Bera , C.V.S. Brahmananda Rao\",\"doi\":\"10.1016/j.calphad.2024.102751\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>High-temperature vaporisation thermodynamic studies over <U<sub>3</sub>Sn<sub>7</sub>(cr) + USn<sub>2</sub>(cr)> and <USn<sub>2</sub>(cr) + USn(cr)> two-phase regions were carried out by employing Knudsen Effusion Mass Spectrometry (KEMS) in the temperature range 1148–1465 and 1222–1471 K, respectively. Sn(g) was the only species observed in the mass spectra of the equilibrium vapour phase over both the biphasic regions. The partial pressure-temperature relations of Sn(g) were deduced as</div><div>log(p<sub>Sn</sub>/Pa) = (−15,737 ± 73)/(T/K)) + (9.52 ± 0.06) (1148–1465 K) <U<sub>3</sub>Sn<sub>7</sub>(cr) + USn<sub>2</sub>(cr)> and</div><div>log(p<sub>Sn</sub>/Pa) = (−16,151 ± 67)/(T/K)) + (9.70 ± 0.05) (1222–1471 K) <USn<sub>2</sub>(cr) + USn(cr)></div><div>Using p-T relations, the enthalpies of the following heterogeneous reaction equilibria were evaluated by the second law method: U<sub>3</sub>Sn<sub>7</sub>(cr) = 3USn<sub>2</sub>(cr) + Sn(g) and USn<sub>2</sub>(cr) = USn(cr) + Sn(g). Subsequently, the Gibbs energies of the formation of U<sub>3</sub>Sn<sub>7</sub>(cr) and USn<sub>2</sub>(cr) were derived. Knudsen effusion mass spectrometric studies over these two biphasic regions are being reported for the first time.</div></div>\",\"PeriodicalId\":9436,\"journal\":{\"name\":\"Calphad-computer Coupling of Phase Diagrams and Thermochemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2024-09-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Calphad-computer Coupling of Phase Diagrams and Thermochemistry\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0364591624000932\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Calphad-computer Coupling of Phase Diagrams and Thermochemistry","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0364591624000932","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Vaporisation thermodynamic studies over and biphasic regions of U-Sn system using high temperature mass spectrometry
High-temperature vaporisation thermodynamic studies over <U3Sn7(cr) + USn2(cr)> and <USn2(cr) + USn(cr)> two-phase regions were carried out by employing Knudsen Effusion Mass Spectrometry (KEMS) in the temperature range 1148–1465 and 1222–1471 K, respectively. Sn(g) was the only species observed in the mass spectra of the equilibrium vapour phase over both the biphasic regions. The partial pressure-temperature relations of Sn(g) were deduced as
Using p-T relations, the enthalpies of the following heterogeneous reaction equilibria were evaluated by the second law method: U3Sn7(cr) = 3USn2(cr) + Sn(g) and USn2(cr) = USn(cr) + Sn(g). Subsequently, the Gibbs energies of the formation of U3Sn7(cr) and USn2(cr) were derived. Knudsen effusion mass spectrometric studies over these two biphasic regions are being reported for the first time.
期刊介绍：
The design of industrial processes requires reliable thermodynamic data. CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) aims to promote computational thermodynamics through development of models to represent thermodynamic properties for various phases which permit prediction of properties of multicomponent systems from those of binary and ternary subsystems, critical assessment of data and their incorporation into self-consistent databases, development of software to optimize and derive thermodynamic parameters and the development and use of databanks for calculations to improve understanding of various industrial and technological processes. This work is disseminated through the CALPHAD journal and its annual conference.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
