M. Vázquez Vázquez, M. J. Díaz Blanco, R. A. Parra Figueroa, E. R. Balladares Varela, O. Jerez Riveros, M. Cuevas Cerda, I. Moreno-Ventas Bravo
{"title":"纯Cu2S和工业白色金属的热氧化降解","authors":"M. Vázquez Vázquez, M. J. Díaz Blanco, R. A. Parra Figueroa, E. R. Balladares Varela, O. Jerez Riveros, M. Cuevas Cerda, I. Moreno-Ventas Bravo","doi":"10.1007/s11085-023-10169-z","DOIUrl":null,"url":null,"abstract":"<div><p>The kinetics of the thermal oxidation of white metal and Cu<sub>2</sub>S have been studied by thermogravimetric analysis (TG), which was carried out under atmospheric oxidative conditions (O<sub>2</sub> 100%) with heating rates of 5, 10, 15 and 20 °C min<sup>−1</sup>. Each experiment was performed three times, the indicated values being the average of the three experiments. The experimental data were evaluated using isoconversional models based on the Arrhenius equation. The models are constructed using first-order mechanisms in the reactions and therefore, since most of them present adequate regression coefficients, it can be verified that order 1 is the most predominant order among the reactions found. In addition, the Kissinger–Akahira–Sunose model, which has the highest regression coefficient, is considered to be the most optimal. Similar behavior was recorded between Cu<sub>2</sub>S and white metal, as well as a similar regular increase in the apparent activation energy (Ea) of 10–30 kJ mol<sup>−1</sup> for both materials. The reactions that took place during the oxidation of white metal and Cu<sub>2</sub>S were determined using a computational model based on thermodynamics developed in this work. The identified phases include CuSO<sub>4</sub>, Cu<sub>2</sub>SO<sub>4</sub>, Cu<sub>2</sub>O, CuO, CuO·CuSO<sub>4</sub>.</p></div>","PeriodicalId":724,"journal":{"name":"Oxidation of Metals","volume":null,"pages":null},"PeriodicalIF":2.1000,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11085-023-10169-z.pdf","citationCount":"0","resultStr":"{\"title\":\"Thermal Oxidative Degradation of Pure Cu2S and Industrial White Metal\",\"authors\":\"M. Vázquez Vázquez, M. J. Díaz Blanco, R. A. Parra Figueroa, E. R. Balladares Varela, O. Jerez Riveros, M. Cuevas Cerda, I. Moreno-Ventas Bravo\",\"doi\":\"10.1007/s11085-023-10169-z\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The kinetics of the thermal oxidation of white metal and Cu<sub>2</sub>S have been studied by thermogravimetric analysis (TG), which was carried out under atmospheric oxidative conditions (O<sub>2</sub> 100%) with heating rates of 5, 10, 15 and 20 °C min<sup>−1</sup>. Each experiment was performed three times, the indicated values being the average of the three experiments. The experimental data were evaluated using isoconversional models based on the Arrhenius equation. The models are constructed using first-order mechanisms in the reactions and therefore, since most of them present adequate regression coefficients, it can be verified that order 1 is the most predominant order among the reactions found. In addition, the Kissinger–Akahira–Sunose model, which has the highest regression coefficient, is considered to be the most optimal. Similar behavior was recorded between Cu<sub>2</sub>S and white metal, as well as a similar regular increase in the apparent activation energy (Ea) of 10–30 kJ mol<sup>−1</sup> for both materials. The reactions that took place during the oxidation of white metal and Cu<sub>2</sub>S were determined using a computational model based on thermodynamics developed in this work. The identified phases include CuSO<sub>4</sub>, Cu<sub>2</sub>SO<sub>4</sub>, Cu<sub>2</sub>O, CuO, CuO·CuSO<sub>4</sub>.</p></div>\",\"PeriodicalId\":724,\"journal\":{\"name\":\"Oxidation of Metals\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2023-07-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s11085-023-10169-z.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Oxidation of Metals\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11085-023-10169-z\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Oxidation of Metals","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11085-023-10169-z","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
Thermal Oxidative Degradation of Pure Cu2S and Industrial White Metal
The kinetics of the thermal oxidation of white metal and Cu2S have been studied by thermogravimetric analysis (TG), which was carried out under atmospheric oxidative conditions (O2 100%) with heating rates of 5, 10, 15 and 20 °C min−1. Each experiment was performed three times, the indicated values being the average of the three experiments. The experimental data were evaluated using isoconversional models based on the Arrhenius equation. The models are constructed using first-order mechanisms in the reactions and therefore, since most of them present adequate regression coefficients, it can be verified that order 1 is the most predominant order among the reactions found. In addition, the Kissinger–Akahira–Sunose model, which has the highest regression coefficient, is considered to be the most optimal. Similar behavior was recorded between Cu2S and white metal, as well as a similar regular increase in the apparent activation energy (Ea) of 10–30 kJ mol−1 for both materials. The reactions that took place during the oxidation of white metal and Cu2S were determined using a computational model based on thermodynamics developed in this work. The identified phases include CuSO4, Cu2SO4, Cu2O, CuO, CuO·CuSO4.
期刊介绍:
Oxidation of Metals is the premier source for the rapid dissemination of current research on all aspects of the science of gas-solid reactions at temperatures greater than about 400˚C, with primary focus on the high-temperature corrosion of bulk and coated systems. This authoritative bi-monthly publishes original scientific papers on kinetics, mechanisms, studies of scales from structural and morphological viewpoints, transport properties in scales, phase-boundary reactions, and much more. Articles may discuss both theoretical and experimental work related to gas-solid reactions at the surface or near-surface of a material exposed to elevated temperatures, including reactions with oxygen, nitrogen, sulfur, carbon and halogens. In addition, Oxidation of Metals publishes the results of frontier research concerned with deposit-induced attack. Review papers and short technical notes are encouraged.