Journal of Magnesium and Alloys最新文献

{"title":"Effects of electromagnetically driven impact and induced electric pulse treatments on mechanical behavior and microstructural evolution of pre-deformed AZ31B magnesium alloy","authors":"Chuan Zhou,&nbsp;Mengting Ran,&nbsp;Fuqiang Tian,&nbsp;Rui Li,&nbsp;Xuan Chen,&nbsp;Yangchao Deng,&nbsp;Zhou Li,&nbsp;Xiaohui Cui","doi":"10.1016/j.jma.2026.102190","DOIUrl":"10.1016/j.jma.2026.102190","url":null,"abstract":"<div><div>This study systematically compares the effects of two external field loading pathways, electromagnetically driven impact treatment (EDIT) and induced electric pulse treatment (IEPT), under different discharge voltages on the mechanical properties, yield behavior, and microstructural evolution of pre-deformed AZ31B magnesium alloy. EDIT subjects the material to a high strain rate loading condition dominated by electromagnetic impact, which promotes dislocation pile-up, substructure formation, and detwinning, while still enabling moderate grain refinement and preserving a high dislocation density, leading to the development of a pronounced yield plateau and a significant increase in yield strength. At the discharge voltage of 7 kV, the EDIT condition enhances the yield strength σ_0.2 by approximately 58% relative to the as-received alloy, while retaining appreciable ductility. The overall mechanical performance is therefore enhanced primarily through strength improvement. In contrast, IEPT is governed mainly by induced electric current and associated Joule heating. The resulting high temperature recovery and recrystallization substantially reduce the dislocation density and cause grain coarsening. This transition converts discontinuous yielding to continuous yielding and almost eliminates the yield plateau. Fractographic analysis indicates that EDIT promotes early strain localization during tensile deformation, accompanied by fracture surfaces with shallow dimples and local quasi-cleavage features. IEPT effectively delays localization and produces deep and dense dimples, indicative of a more stable plastic deformation mode. Further analysis correlates the emergence and suppression of the yield plateau with dislocation evolution, and identifies IEPT induced high temperature recovery as a key factor responsible for plateau suppression. In addition, increasing discharge voltage during EDIT reduces the amount of {10-12} tensile twinning and increases the fraction of low-angle grain boundaries, suggesting that electromagnetic impact promotes detwinning related microstructural evolution. These findings contribute to a deeper understanding of how different electromagnetic loading pathways regulate yielding behavior and plasticity mechanisms in magnesium alloys.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102190"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148460217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inherent effect of LPSO phase morphology on the dynamic recrystallization behaviors of extruded Mg-Gd-Y-Zn-Zr alloys","authors":"Tingting Yue,&nbsp;Zhirou Zhang,&nbsp;Zelong Du,&nbsp;Guang Zeng,&nbsp;Yanjin Xu,&nbsp;Chao Xu,&nbsp;Zongning Chen,&nbsp;Huijun Kang,&nbsp;Enyu Guo,&nbsp;Tongmin Wang","doi":"10.1016/j.jma.2026.102183","DOIUrl":"10.1016/j.jma.2026.102183","url":null,"abstract":"<div><div>Complex phase constitutions are commonly observed in rare-earth magnesium alloys, and the morphology of long-period stacking-ordered (LPSO) phases significantly affects deformation and dynamic recrystallization (DRX) behavior. In this work, different LPSO-containing microstructures were tailored in a Mg-Gd-Y-Zn-Zr alloy by controlling the post-homogenization cooling route, including water cooling (WC), air cooling (AC), and furnace cooling (FC). The effects of LPSO phase morphology on DRX during hot extrusion were systematically investigated. DRX fractions of WC, AC, and FC samples were 6.5%, 23.1%, and 51.4%, respectively. In WC sample, dynamically precipitated lamellar LPSO phases suppressed DRX by impeding dislocation motion. In contrast, blocky LPSO phases in FC sample promoted dislocation accumulation, while pre-existing lamellar LPSO phases facilitated kink-band formation and continuous DRX. AC sample exhibited an intermediate DRX fraction due to the coexistence of different LPSO morphologies. Correspondingly, the WC sample achieved the highest ultimate tensile strength of 471 MPa, which was mainly attributed to the combined effects of strong basal texture, dislocation strengthening, solid-solution strengthening, and precipitation strengthening from dynamically precipitated lamellar LPSO phases. With decreasing cooling rate, grain boundary strengthening and kink-band-related strengthening became more pronounced in the AC and FC samples. The FC sample exhibited the highest elongation of 7.5%, owing to enhanced DRX, grain refinement, and texture weakening. These findings demonstrate that cooling-rate-controlled LPSO morphology is an effective strategy for regulating DRX behavior and tailoring the strength–ductility balance of Mg-Gd-Y-Zn-Zr alloys.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102183"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148949610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced corrosion resistance by engineering basal-oriented grains in Mg-Al-Sn-Ca alloys to retard H/O/Cl adsorption through friction stir processing","authors":"Xiao-Rui Dong,&nbsp;Da-Wei Wang,&nbsp;Rui Zhou,&nbsp;Wei-Chao Zhao,&nbsp;Pin-Kui Ma,&nbsp;Lei Zhao,&nbsp;Min Zha","doi":"10.1016/j.jma.2026.102092","DOIUrl":"10.1016/j.jma.2026.102092","url":null,"abstract":"<div><div>The present work demonstrates that friction stir processing/welding (FSP/FSW) significantly enhances the corrosion resistance of twin-roll cast (TRC) Mg-Al-Sn-Ca alloy, reducing the corrosion rate to as low as 0.5 mm/y. This improvement arises from a substantial increase in basal-oriented grain fraction (from 12 to 70%) alongside grain refinement and secondary-phase spheroidization. The enriched basal-oriented grains suppress the adsorption of H, O, and Cl, inhibiting key electrochemical processes such as hydrogen evolution, localized oxidation, and chloride-induced pitting corrosion. Importantly, no galvanic corrosion is observed between TRC base metal and FSP zone, highlighting the dual potential of FSP/FSW for both corrosion-resistant surface engineering and structural joining.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102092"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148949684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-entropy TiVNbMoC3 MXene as a highly efficient catalyst for improving the hydrogen storage properties of MgH2","authors":"Yiqi Sun,&nbsp;Guangxu Li,&nbsp;Wenjing He,&nbsp;Hua Ning,&nbsp;Cunke Huang,&nbsp;Zhiqiang Lan,&nbsp;Wenzhou Zhou,&nbsp;Jin Guo,&nbsp;Xinhua Wang,&nbsp;Haizhen Liu","doi":"10.1016/j.jma.2026.102181","DOIUrl":"10.1016/j.jma.2026.102181","url":null,"abstract":"<div><div>MgH₂ is widely regarded as a promising solid-state hydrogen carrier. Nevertheless, the slow sorption rates and high thermal stability limit its commercial viability. To address these issues, this work describes the synthesis of a layered TiVNbMoC₃ high-entropy MXene derived from the TiVNbMoAlC₃ MAX phase. This MXene was subsequently employed as an additive into MgH₂ through ball milling treatment. For the MgH₂ + 10 wt% TiVNbMoC₃ composite, the initial temperature for hydrogen release is 190 °C, with 6.4 wt% of hydrogen liberated in 10 min at 300 °C. The dehydrogenation activation energy dropped from 145 to 92 kJ mol⁻¹. The dehydrogenated composite can start rehydrogenation at room temperature and has a hydrogen uptake capacity of 6.0 wt% within 60 min under conditions of 6 MPa H₂ and 150 °C. Furthermore, the sample exhibits excellent cycling stability, retaining 97% of its capacity after 50 cycles, with the hydrogen desorption amount slightly changing from 6.6 wt% in the second cycle to 6.4 wt% in the 50th cycle. Microstructural studies indicate that the layered TiVNbMoC₃ MXene can serves as a separator for preventing the MgH₂ grain growth, while the Mg/MgH₂/TiVNbMoC₃ multiple-phase interfaces can also provide good channels for hydrogen adsorption, dissociation, and diffusion. Theoretical calculations suggest that the TiVNbMoC₃ MXene significantly weakens the Mg–H bond and an electron transfer channel is formed between the H atoms and the four transition metal atoms of high-entropy MXene. It is also believed that the high-entropy MXene can provide a large number of hydrogen adsorption sites for MgH₂, which is helpful in capturing hydrogen atoms at the contact interface. The synergy of the above factors leads to the significant improvement of the hydrogen storage properties of MgH₂. This study offers a novel effective strategy for improving the hydrogen storage properties of MgH₂ by high-entropy MXenes.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102181"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148312880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on phase evolution and separation behavior in Gd-containing magnesium alloy scrap recycling by vacuum gasification","authors":"Lipeng Wang,&nbsp;Meng Wang,&nbsp;Tingzhuang Ma,&nbsp;Yang Tian,&nbsp;Bin Yang,&nbsp;Baoqiang Xu,&nbsp;Fei Wang","doi":"10.1016/j.jma.2026.102070","DOIUrl":"10.1016/j.jma.2026.102070","url":null,"abstract":"<div><div>High-performance Gd-containing Mg alloys are widely used in aerospace and high-temperature applications, yet conventional recycling processes suffer from significant rare earth loss and low recovery rate, seriously hindering the circular utilization of Mg and strategically valuable Gd. To address this challenge, vacuum gasification technology was employed for the synergistic recovery of Mg and Gd from such scrap, integrating thermodynamic calculations, phase diagram analysis, phase evolution investigations of the Mg-Gd system, and validation experiments on JDM4 alloy scrap. The results demonstrate that vacuum gasification enables effective Mg-Gd separation, with reduced system pressure significantly lowering the required process temperature. Both theoretical and experimental results confirm a consistent phase evolution sequence during separation: Mg₅Gd → Mg₃Gd → Mg₂Gd → MgGd → Gd. During gasification, the Mg-Gd intermetallic compounds exist in a molten state and form a Gd-rich multilayer encapsulated structure, with Gd content increasing from the inside out. This structure inhibits Mg volatilization and induces splashing, leading to Gd loss. Reasonable regulation of the temperature and holding time, the decomposition progression and the state of these encapsulation layers can be effectively managed. Vacuum gasification of JDM4 scrap yielded condensed Mg with a purity of 99.945 wt.% and a Gd product with 93.71 wt.% purity, at recovery rates of 96.61% and 99.91%, respectively. This study provides robust theoretical and practical support for the efficient recycling of Gd-containing magnesium alloys, offering key technical guidance for promoting the sustainable circular economy of Mg and rare earth resources.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102070"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148949754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PEDOT: PSS/MAO@Co organic composite coating: Enhancement of corrosion resistance and conductivity properties of VW75 magnesium alloy","authors":"Ran Wei,&nbsp;Quantong Jiang,&nbsp;Dongxiao Han,&nbsp;Ye Chen,&nbsp;Wanpeng Liu,&nbsp;Yantong Pei,&nbsp;Wei Wang,&nbsp;Jizhou Duan,&nbsp;Baorong Hou","doi":"10.1016/j.jma.2026.102136","DOIUrl":"10.1016/j.jma.2026.102136","url":null,"abstract":"<div><div>A functional composite coating system was developed on VW75 magnesium alloy to address the trade-off between corrosion resistance and electrical conductivity. A micro-arc oxidation (MAO) inner layer incorporating Ta₂O₅ particles was first fabricated, followed by the deposition of an epoxy resin topcoat doped with PEDOT: PSS and cobalt (Co) powder. The microstructure, phase composition, and electrochemical properties of the composite coatings were systematically characterized. The results indicated that the incorporation of Ta₂O₅ particles significantly enhanced the compactness of the MAO layer, with optimal corrosion resistance achieved at a Ta₂O₅ concentration of 6 g/L. When the concentration of Ta₂O₅ is 6 g/L, the pore size distribution of the coating is moderate, which can form a strong bonding force with the epoxy coating. The subsequent application of the modified epoxy topcoat further augmented the protective performance via a pore-sealing effect. Notably, the corrosion resistance was positively correlated with the content of dopants. Furthermore, the PEDOT: PSS and Co fillers facilitated the formation of a conductive percolation network within the epoxy matrix, thereby imparting excellent electrical conductivity to the composite. These findings demonstrate the potential of this dual-layer coating strategy for protecting magnesium alloys in harsh marine environments.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102136"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148949758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elucidating the morphology difference of intermetallic compounds in Mg-to-Al weld nugget zone via multiphase-field simulation","authors":"Fengyuan Zhao,&nbsp;Jinqiang Gao,&nbsp;ChuanSong Wu,&nbsp;Lei Shi","doi":"10.1016/j.jma.2026.102091","DOIUrl":"10.1016/j.jma.2026.102091","url":null,"abstract":"<div><div>Friction stir welding (FSW) of dissimilar Mg/Al alloys enables lightweight hybrid structures, yet joint performance is strongly governed by the thickness and morphology of intermetallic compounds (IMCs) formed in the weld nugget zone (WNZ). The coupling between dynamic recrystallization (DRX) and IMCs nucleation/growth is quantified using experimental characterization and a multiphase-field model. The results reveal an Al-based supersaturated solid solution at the Al/Al₃Mg₂ interface, providing sufficient driving force for Al₃Mg₂ nucleation, whereas the driving force for Al₁₂Mg₁₇ nucleation at the Mg/Al₁₂Mg₁₇ interface is much smaller, leading to equiaxed Al₃Mg₂ but predominantly columnar Al₁₂Mg₁₇. The observed morphological difference arises from the combined effects of the disparate diffusion rates of Al and Mg atoms and the distinct composition ranges of the two IMCs on the phase diagram. Compared with the bottom region, the mid-WNZ experiences stronger DRX, generating more grain-boundary nucleation sites. Incorporating DRX also delays vacancy-mediated diffusion such that the peak diffusion period becomes synchronized with the most intense DRX stage, promoting the formation of new IMC layers. Consequently, the peak diffusion coefficient increases at the mid-WNZ but decreases at the bottom region. Owing to the higher temperature in mid-WNZ and enhanced nucleation kinetics, equiaxed IMCs are more likely to form there. This work provides a mechanistic basis for tailoring IMC thickness and morphology in dissimilar Mg/Al FSW.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102091"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148949686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Additively manufactured and surface textured Mg containing high entropy alloys for biomedical applications","authors":"Amit Choudhari,&nbsp;Kavitha Sharanappa Gudadur,&nbsp;Avinash Kumar,&nbsp;Abhishek Kumar","doi":"10.1016/j.jma.2026.102159","DOIUrl":"10.1016/j.jma.2026.102159","url":null,"abstract":"<div><div>High-entropy alloys (HEAs) are promising materials for biomedical applications due to their outstanding corrosion resistance, high strength-to-weight ratios, favorable wear behavior, and emerging biocompatibility. However, their limitations include complex phase formation, challenges in maintaining compositional homogeneity and controlling elemental evaporation during processing, and difficulties associated with large-scale manufacturing. Additive manufacturing enables the design and fabrication of intricate HEA structures, while surface texturing enhances biocompatibility by improving cell adhesion, proliferation, and antibacterial activity. This review focuses on the potential of additively manufactured and surface-textured Mg-containing HEAs for biomedical applications. Mg-containing HEAs fabricated through selective laser melting have demonstrated tensile strengths exceeding 400 MPa, along with corrosion rates approximately 30% lower than those of conventionally processed alloys. In addition, surface texturing techniques, such as laser ablation, have been shown to significantly enhance osteoblast adhesion in-vitro studies. The article reviews the fundamentals of HEAs, additive manufacturing techniques including selective laser melting and electron beam melting, and advanced surface texturing approaches such as laser ablation and anodization. It highlights how these strategies influence mechanical performance, including tensile and fatigue behavior, as well as biomedical characteristics such as biodegradability and biocompatibility. Key challenges related to process optimization, microstructural complexity, and potential cytotoxicity of specific alloying elements are discussed. Future research directions emphasize advanced modeling, process control, and the integration of bioactive surface modifications to further improve the performance of Mg-containing HEAs. Overall, additively manufactured and surface-textured Mg-containing HEAs represent a promising pathway toward next-generation biomedical devices that combine structural reliability with biological functionality.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102159"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148949751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances in magnesium alloy scaffolds as next-generation anticancer platforms","authors":"Zhongchao Yi,&nbsp;Yanjun Wang,&nbsp;Jingyang Yin,&nbsp;Cuie Wen,&nbsp;Huaizhi Wang,&nbsp;Shixiang Guo","doi":"10.1016/j.jma.2026.102160","DOIUrl":"10.1016/j.jma.2026.102160","url":null,"abstract":"<div><div>Biodegradable magnesium alloys have recently emerged as a class of multifunctional biomaterials with growing potential in oncological applications. Beyond their established roles in orthopedic and cardiovascular fields, magnesium alloys exhibit a unique capacity to modulate the tumor microenvironment through corrosion-derived products, including magnesium ions, hydrogen gas, hydroxide ions, and magnesium hydroxide. These degradation products exert pleiotropic antitumor effects by disrupting mitochondrial bioenergetics, inducing oxidative stress, regulating extracellular pH, and enhancing immune surveillance. In addition to these intrinsic mechanisms, magnesium alloys have been explored as therapeutic platforms for localized tumor intervention, including hyperthermia and surface-enabled delivery strategies. Despite these advances, challenges remain in achieving precise degradation control, ensuring biosafety, and facilitating clinical translation. This review summarizes the mechanistic basis of magnesium alloy-mediated anticancer effects and provides an overview of current therapeutic strategies, along with key barriers to clinical application. Continued progress in surface engineering, additive manufacturing, and targeted delivery systems will support the rational design of next-generation magnesium-based oncological implants.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102160"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148949752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical and experimental studies on magnesite smelting for co-producing forsterite via silicothermic magnesium production under relative vacuum","authors":"Dong Wang,&nbsp;Xiao-xi Zhao,&nbsp;Jia-xin Zuo,&nbsp;Ting-an Zhang","doi":"10.1016/j.jma.2026.102138","DOIUrl":"10.1016/j.jma.2026.102138","url":null,"abstract":"<div><div>As a magnesium ore resource with abundant reserves and excellent cost-effectiveness, the efficient utilization of magnesite in the magnesium smelting process is of great significance to the green and low-carbon development of the magnesium metallurgical industry. In this paper, a systematic theoretical and experimental study was carried out on the in-situ reduction and phase change dissipation of magnesium prepared by relative vacuum silicothermic reduction of magnesite without the addition of calcium. A process for silicothermic magnesium production from magnesite under relative vacuum without calcium addition, which co-produces forsterite (RVMS-CF), was proposed. Meanwhile, the Gibbs free energy, equilibrium temperature of the reduction reaction were calculated based on the laws of thermodynamics. The reaction mechanism of RVMS-CF was elucidated through experimental investigations. The effects of different molar ratios of magnesium oxide to silicon on the magnesium reduction rate and the products of reduction slag were investigated. The experimental results show that when the molar ratio of magnesium oxide to silicon is 1.8:1, the magnesium reduction rate reaches the maximum of 82.26%. Furthermore, the energy consumption of the new process can be reduced by &gt;40% compared with the Pidgeon process, and the production cost per ton of magnesium can be cut by &gt;3000 CNY relative to the latter, representing excellent economic benefits. This study provides a theoretical basis and technical support for the engineering application of the RVMS-CF process, and offers insights for the development of continuous magnesium smelting technologies.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"21 ","pages":"Article 102138"},"PeriodicalIF":15.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148383708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}