{"title":"Effect of heating and purge flow rates on Magnesium Nitridation reaction using Thermogravimetry","authors":"Sairaj Gaunekar, Anirudha Ambekar","doi":"10.1016/j.tca.2025.179974","DOIUrl":null,"url":null,"abstract":"<div><div>Magnesium nitride forms when magnesium reacts with nitrogen at high temperatures. This paper analyzes the effect of heating rates and purge flow rates on the magnesium nitridation reaction using Thermogravimetry (TG) equipment. Magnesium nitridation and minuscule oxidation were observed due to reactions with nitrogen and oxygen impurities in the nitrogen gas supply for lower heating rates (LHR) at 8, 10, 12, and 15 K/min. For higher heating rates (HHR) at 20, 22, 25, and 27 K/min, a competing magnesium vaporization reaction was observed after 650 °C. The vaporization reaction results in mass loss, altering the overall chemical kinetics. A decrease in average apparent activation energy values was obtained for higher flow rate experiments. Change in apparent activation energy was related to the compaction and rupture of the nitride and oxide layer. The results of this study provide valuable insights into the magnesium explosion inerting and the selective laser melting (SLM) process.</div></div>","PeriodicalId":23058,"journal":{"name":"Thermochimica Acta","volume":"747 ","pages":"Article 179974"},"PeriodicalIF":3.1000,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thermochimica Acta","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0040603125000504","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Magnesium nitride forms when magnesium reacts with nitrogen at high temperatures. This paper analyzes the effect of heating rates and purge flow rates on the magnesium nitridation reaction using Thermogravimetry (TG) equipment. Magnesium nitridation and minuscule oxidation were observed due to reactions with nitrogen and oxygen impurities in the nitrogen gas supply for lower heating rates (LHR) at 8, 10, 12, and 15 K/min. For higher heating rates (HHR) at 20, 22, 25, and 27 K/min, a competing magnesium vaporization reaction was observed after 650 °C. The vaporization reaction results in mass loss, altering the overall chemical kinetics. A decrease in average apparent activation energy values was obtained for higher flow rate experiments. Change in apparent activation energy was related to the compaction and rupture of the nitride and oxide layer. The results of this study provide valuable insights into the magnesium explosion inerting and the selective laser melting (SLM) process.
期刊介绍：
Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application.
The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta.
The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas:
- New and improved instrumentation and methods
- Thermal properties and behavior of materials
- Kinetics of thermally stimulated processes
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