IF 2.3 4区材料科学

JOM Pub Date : 2025-08-12 DOI: 10.1007/s11837-025-07620-8

A. T. Oriola, J. D. Maile, A. Nguyen, H. Do, R. Kumar, E. J. Payton

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Sharing Ideas Across Disciplines at TMS Specialty Congress 2025 在2025年TMS专业大会上分享跨学科的想法

IF 2.3 4区材料科学

JOM Pub Date : 2025-08-11 DOI: 10.1007/s11837-025-07649-9

Megan Enright

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2024 PERFORMANCE METRICS ANNOUNCED FOR TMS JOURNALS 为TMS期刊公布了2024个性能指标

IF 2.3 4区材料科学

JOM Pub Date : 2025-08-08 DOI: 10.1007/s11837-025-07650-2

Matt Baker

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Effects of Temperature on the “Preg-Robbing” Ability of Organic Carbon in Carbonaceous Gold Ore During Vacuum Roasting Pretreatment: Anthracite as a Model 真空焙烧预处理过程中温度对碳质金矿石中有机碳“抢胎”能力的影响——以无烟煤为例

IF 2.3 4区材料科学

JOM Pub Date : 2025-08-07 DOI: 10.1007/s11837-025-07602-w

Xinwei Zhang, Yonghui Song, Jiaoe Dang, Teng Li, Wenlong Huang, Ning Yin

{"title":"Effects of Temperature on the “Preg-Robbing” Ability of Organic Carbon in Carbonaceous Gold Ore During Vacuum Roasting Pretreatment: Anthracite as a Model","authors":"Xinwei Zhang, Yonghui Song, Jiaoe Dang, Teng Li, Wenlong Huang, Ning Yin","doi":"10.1007/s11837-025-07602-w","DOIUrl":"10.1007/s11837-025-07602-w","url":null,"abstract":"<div><p>In this study, anthracite has the most similar “preg-robbing” characteristics to the organic carbon of carbonaceous gold ore. Vacuum roasting experiments were conducted on anthracite as a model of organic carbon to investigate the impact of temperature on the “preg-robbing” ability of organic carbon in carbonaceous gold ore during the vacuum roasting process. The changes in the pore structure, functional groups and carbon structure of anthracite were characterized using different analysis methods. The results showed that the anthracite thermal decomposed in the vacuum roasting process. The gold adsorption rate of anthracite decreased sharply from 97.48% (800 °C) to 4.67% (1200 °C), representing the main change stage of its “preg-robbing” ability. The morphology and pore structure of anthracite had no obvious change during the whole roasting process, the rapid disappearance of anthracite functional groups mainly occurred below 800 °C. These results all suggested that the “preg-robbing” ability change of anthracite was not caused by its pore structure or functional groups. The change in anthracite’s carbon structure was consistent with the change in its “preg-robbing” ability. The anthracite entered the graphitization process around 800 °C upon increasing temperature, the internal carbon structure gradually changed from the disordered state to an orderly state. With increasing graphitization degree, the gold-adsorption ability was reduced. The transition of carbon structure from disordered to ordered state during vacuum roasting might be the key reason for the decrease in the “preg-robbing” ability of organic carbon. This study established a direct correlation between graphitization degree and preg-robbing capacity reduction, providing a novel strategy for optimizing gold recovery in refractory ores.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 10","pages":"7388 - 7400"},"PeriodicalIF":2.3,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Effect of Thermal Conductors on Thermomechanical Properties of Stearic Acid–Gypsum Composites 导热体对硬脂酸-石膏复合材料热力学性能的影响

IF 2.3 4区材料科学

JOM Pub Date : 2025-08-07 DOI: 10.1007/s11837-025-07608-4

Chang Chen, Bao Xu, Duoming Wang, Huan Wang, Yanxin Chen, Shaowu Jiu, Yan Liu

{"title":"Effect of Thermal Conductors on Thermomechanical Properties of Stearic Acid–Gypsum Composites","authors":"Chang Chen, Bao Xu, Duoming Wang, Huan Wang, Yanxin Chen, Shaowu Jiu, Yan Liu","doi":"10.1007/s11837-025-07608-4","DOIUrl":"10.1007/s11837-025-07608-4","url":null,"abstract":"<div><p>Stearic acid (SA)–gypsum composites containing different thermal conductors (TCs) were fabricated, and their mechanical, thermal, and microscopic properties were studied. The SA–gypsum composites containing 20 wt.% SA exhibited optimal mechanical properties. After 7 days, their flexural and compressive strengths were 3.08 and 8.26 MPa, respectively. The optimal iron particle, copper particle, and expanded graphite particle contents in the TC–SA–gypsum composites were 6 wt.%, 10 wt.%, and 6 wt.%, respectively. However, the mechanical properties of these composites were slightly less than those of the SA–gypsum composite. The thermal conductivities of the iron particle–SA–gypsum, copper particle–SA–gypsum, and expanded graphite particle–SA–gypsum composites were 1.3383 W/(m K), 1.9619 W/(m K), and 2.3651 W/(m K), respectively, which were considerably greater than those of the SA–gypsum composites. In the expanded graphite–SA–gypsum composite, a thermal absorption peak was observed when the temperature rose from 45 °C to 110 °C. The temperature and enthalpy of phase transition were 52.09 °C and 91.36 J/g, respectively.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 10","pages":"7339 - 7349"},"PeriodicalIF":2.3,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Residual Stresses in CuSn10 Structures: A Macroscopic Investigation of Scan Strategies and Heat Treatments CuSn10结构中的残余应力：扫描策略和热处理的宏观研究

IF 2.3 4区材料科学

JOM Pub Date : 2025-08-06 DOI: 10.1007/s11837-025-07585-8

Robert Kremer, Tamara Appel, Johannes Buhl, Heinz Palkowski

{"title":"Residual Stresses in CuSn10 Structures: A Macroscopic Investigation of Scan Strategies and Heat Treatments","authors":"Robert Kremer, Tamara Appel, Johannes Buhl, Heinz Palkowski","doi":"10.1007/s11837-025-07585-8","DOIUrl":"10.1007/s11837-025-07585-8","url":null,"abstract":"<div><p>To address the challenges of stress-induced distortion in additive manufacturing via laser powder bed fusion of CuSn10, the effects of different scanning strategies (cross-scan vs. island strategy) and various heat treatments (200°C, 300°C, 700°C) were analyzed regarding their effectiveness in reducing stress, as well as their impact on microstructure and hardness. The results indicate that the island strategy leads to higher values compared to the cross-scan strategy. A stress-relief annealing at 200°C for 2 h significantly reduced the bending strain by 83%, while 300°C for 2 h achieved almost complete stress relief of 96%. However, both treatments affected the material’s strength. A solution-annealing treatment at 700°C reduced distortion by approximately 90% and resulted in a pronounced microstructural evolution accompanied by a notable decrease in hardness. Overall, this study demonstrates that using continuous scanning vectors (cross-scan) yields lower stresses for CuSn10. Furthermore, it shows that thermal post-treatment can effectively reduce residual stresses, although one must balance this effect against the associated changes in material properties.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 10","pages":"7576 - 7591"},"PeriodicalIF":2.3,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

JOM Technical Topics JOM技术主题

IF 2.3 4区材料科学

JOM Pub Date : 2025-08-04 DOI: 10.1007/s11837-025-07644-0

引用次数: 0

TMS Meeting Headlines TMS会议头条

IF 2.3 4区材料科学

JOM Pub Date : 2025-08-04 DOI: 10.1007/s11837-025-07651-1

引用次数: 0

High-Efficiency Removal of Silica and Alumina from Rough Concentrate of Refractory Oolitic Hematite Ore via High-Pressure Alkaline and Acid-Leaching Process 高压碱酸浸法高效脱除难选鲕状赤铁矿粗精矿中的二氧化硅和氧化铝

IF 2.3 4区材料科学

JOM Pub Date : 2025-07-25 DOI: 10.1007/s11837-025-07574-x

Mengjie Hu, Deqing Zhu, Jian Pan, Zhengqi Guo, Congcong Yang, Siwei Li, Wen Cao

{"title":"High-Efficiency Removal of Silica and Alumina from Rough Concentrate of Refractory Oolitic Hematite Ore via High-Pressure Alkaline and Acid-Leaching Process","authors":"Mengjie Hu, Deqing Zhu, Jian Pan, Zhengqi Guo, Congcong Yang, Siwei Li, Wen Cao","doi":"10.1007/s11837-025-07574-x","DOIUrl":"10.1007/s11837-025-07574-x","url":null,"abstract":"<div><p>Despite the abundant reserves of high-phosphorus oolitic iron ore, its complex mineral structure, ultrafine crystal grains, and elevated phosphorus content render conventional beneficiation techniques ineffective for the deep removal of silicon, aluminum, and phosphorus impurities. This study innovatively proposes a synergistic impurity removal process that combines high-pressure alkaline leaching with acid leaching. Compared with conventional alkaline leaching, the high-pressure leaching process has significant advantages: the leaching duration decreases from 60 min to 20 min, the NaOH consumption decreases from 300 kg/t to 200 kg/t, the iron concentration increases from 58.14% to 61.95%, and the SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, and P contents decrease to 2.53%, 6.58%, and 0.052%, respectively. Mechanistic studies reveal that elevated temperature and pressure conditions significantly enhance the penetration of NaOH solution into particle interiors, where the alkaline medium selectively reacts with silicate gangue phases. This reaction disrupts the oolitic structure, exposing fresh reactive surfaces and accelerating gangue dissolution kinetics. The synergistic effects establish a three-dimensional leaching channel network on particle surfaces, providing critical thermodynamic and kinetic conditions for efficient impurity removal. These findings offer theoretical insights into the high-value utilization of similarly refractory iron ores and propose a transformative technical framework for deep impurity extraction in complex ore systems.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 9","pages":"6467 - 6479"},"PeriodicalIF":2.3,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the Macromechanical Properties and Microstructure of Carbonized Steel Slag Fine Aggregate Concrete 碳化钢渣细骨料混凝土宏观力学性能及微观结构研究

IF 2.3 4区材料科学

JOM Pub Date : 2025-07-25 DOI: 10.1007/s11837-025-07603-9

Yunqi Song, Gang Xue, Wei Dong, Jiangsen Liu

{"title":"Research on the Macromechanical Properties and Microstructure of Carbonized Steel Slag Fine Aggregate Concrete","authors":"Yunqi Song, Gang Xue, Wei Dong, Jiangsen Liu","doi":"10.1007/s11837-025-07603-9","DOIUrl":"10.1007/s11837-025-07603-9","url":null,"abstract":"<div><p>To investigate the macromechanical properties and microstructural characteristics of carbonated steel slag fine aggregate concrete (CSSFC), steel slag with particle sizes < 5 mm was selected. After carbonation, the steel slag was used to replace natural sand in equal volumes, resulting in concrete samples with carbonated steel slag fine aggregate (CSSA) contents of 0%, 10%, 20%, and 30%. The study evaluated the compressive strength, splitting tensile strength, flexural strength, and axial compressive strength of CSSFC. Additionally, stress-strain curves for the concrete were obtained. The microstructural characteristics of CSSFC were analyzed using scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), nanoindentation, and mercury intrusion porosimetry. Furthermore, the fractal characteristics of the pore structure in CSSFC were analyzed. The results indicate that as the content of CSSA increases from 0% to 30%, the compressive strength, splitting tensile strength, and axial compressive strength of the CSSA concrete progressively improve. CSSA demonstrates significant hydration activity, which enhances the densification of the interface transition zone (ITZ) between the cement matrix and the steel slag aggregate, thereby reducing microcracks. Compared to natural aggregates, CSSA shows a more pronounced interface transition zone, with an approximate width of 8 μm. The average hardness and elastic modulus of CSSA are 78.3% and 87.7% higher than those of natural aggregates, respectively. As CSSA content increases from 0% to 30%, porosity initially increases and then decreases. Additionally, as the fractal dimension rises, the average pore diameter, median pore diameter, compressive strength, splitting tensile strength, and flexural strength increase, while the pore surface area decreases.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 10","pages":"7626 - 7641"},"PeriodicalIF":2.3,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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