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}

引用次数: 0

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

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

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

Selective Separation Mechanism of Arsenic and Antimony in Lead-Zinc Smelting Dust 铅锌冶炼粉尘中砷锑的选择性分离机理

IF 2.3 4区材料科学

JOM Pub Date : 2025-07-25 DOI: 10.1007/s11837-025-07562-1

Lei Mei, YaMing Zhou, JiaRun Zhang, ZhiHong Liu, ZhiYong Liu

{"title":"Selective Separation Mechanism of Arsenic and Antimony in Lead-Zinc Smelting Dust","authors":"Lei Mei, YaMing Zhou, JiaRun Zhang, ZhiHong Liu, ZhiYong Liu","doi":"10.1007/s11837-025-07562-1","DOIUrl":"10.1007/s11837-025-07562-1","url":null,"abstract":"<div><p>The smelting process of lead (Pb) and zinc (Zn) affords various types of dusts, which often contain high concentrations of arsenic (As) and antimony (Sb) introduced into the system from raw materials. These dusts also contain economically valuable elements such as bismuth, tin and tellurium. Herein, we explored an efficient As removal method to facilitate the comprehensive recovery of valuable metals from dusts produced during Pb and Zn smelting. As- and Sb-bearing dust produced during the Pb-Zn smelting process was subjected to alkaline oxidative pressure leaching. The total leaching efficiency of As (measured from both the leaching and washing solutions) increased to 98.26%, whereas that of Sb was < 0.5%. During the reaction, trivalent As was oxidised to pentavalent As, which transformed into sodium arsenate (Na<sub>3</sub>AsO<sub>4</sub>·10H<sub>2</sub>O). As the solubility of Na<sub>3</sub>AsO<sub>4</sub>·10H<sub>2</sub>O reduces in highly alkaline solutions, this led to its precipitation and a corresponding reduction in the leaching efficiency of As. However, after washing, the alkalinity of the solution changed, facilitating the dissolution of Na<sub>3</sub>AsO<sub>4</sub>·10H<sub>2</sub>O. In addition, under high alkalinity, Sb converts to sodium antimonate. Furthermore, at low alkalinity, the solubility behaviours of Na<sub>3</sub>AsO<sub>4</sub>·10H<sub>2</sub>O and sodium antimonate are inversely related, facilitating their effective separation.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 10","pages":"7696 - 7709"},"PeriodicalIF":2.3,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11837-025-07562-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Bending Angle on Defect Formation in ER4043 Aluminum Alloy in Wire Arc Additive Manufacturing 电弧增材制造中弯曲角度对ER4043铝合金缺陷形成的影响

IF 2.3 4区材料科学

JOM Pub Date : 2025-07-21 DOI: 10.1007/s11837-025-07565-y

Jiaxin Shi, Milan Brandt, Andrey Molotnikov, Mark Easton

{"title":"Effect of Bending Angle on Defect Formation in ER4043 Aluminum Alloy in Wire Arc Additive Manufacturing","authors":"Jiaxin Shi, Milan Brandt, Andrey Molotnikov, Mark Easton","doi":"10.1007/s11837-025-07565-y","DOIUrl":"10.1007/s11837-025-07565-y","url":null,"abstract":"<div><p>Direct energy deposition using an arc source (DED-Arc), also known as wire arc additive manufacturing, is a promising technique to fabricate large engineering components due to the high deposition rates. ER4043 aluminum alloy is widely used as a commercial feedstock for DED-Arc. However, defects such as porosity and cracking pose significant challenges and affect process reliability, particularly in real parts with more complex geometries. This study investigates the influence of the deposited geometry (bending angle in zig-zag tracks) on microstructure and defect formation in ER4043 fabricated by DED-Arc. Experimental results show that increasing bending deviations in bent corners intensify defect formation because of the thermal profile variations and localized stress accumulation during solidification. Additionally, distinct grain morphologies and defect distributions are observed at the interior and anterior edges of bent corners. These findings highlight that zig-zag tracks can be used as a practical approach for improving process reliability and defect control for industrial-scale DED-Arc in aluminum components.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 10","pages":"7264 - 7273"},"PeriodicalIF":2.3,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11837-025-07565-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145078837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Oxygen on the Phase Reconstruction of Low-Grade Complicated Niobium Resources During Cooling Process 氧对低品位复杂铌资源冷却过程中相重构的影响

IF 2.3 4区材料科学

JOM Pub Date : 2025-07-18 DOI: 10.1007/s11837-025-07541-6

Wensheng Han, Mengjie Ran, Xiang Lu, Chuling Jiang, Yulin Zhou, Wen Chen

{"title":"Effects of Oxygen on the Phase Reconstruction of Low-Grade Complicated Niobium Resources During Cooling Process","authors":"Wensheng Han, Mengjie Ran, Xiang Lu, Chuling Jiang, Yulin Zhou, Wen Chen","doi":"10.1007/s11837-025-07541-6","DOIUrl":"10.1007/s11837-025-07541-6","url":null,"abstract":"<div><p>Aiming at the low-grade complicated niobium (Nb) resources in Bayan Obo with complex mineral paragenesis, the phase reconstruction method through high-temperature melting–cooling technology is a promising strategy for changing the occurrence mode of niobium. However, the effects of oxygen on phase reconstruction are still unclear. In this study, the effects of oxygen on the Nb-bearing phase reconstruction were investigated by turning the oxygen concentration from 0% to 100%. Through adjusting the atmosphere from argon (Ar) into oxygen (O<sub>2</sub>), the enriched phase of Nb was transformed into calciobetafite (Ca<sub>2</sub>(Ti,Nb)<sub>2</sub>O<sub>7</sub>) from loparite ((Ce,Na,Ca)(Nb,Ti)O<sub>3</sub>). In addition, oxygen is beneficial in reducing the content of impurity elements in the pyrochlore-type Ca<sub>2</sub>(Ti,Nb)<sub>2</sub>O<sub>7</sub> phase and improving the co-enrichment of Nb and cerium (Ce). The mechanism of phase transformation under different atmospheres has been discussed through the process of crystallization. In addition, the crystallization of Fe<sub>2</sub>O<sub>3</sub> under a high oxygen concentration provides a clean recovery of iron from tailings. This study found that adjusting the oxygen concentration of the crystallization process is a controllable method of niobium-bearing phase reconstruction. In addition, this study provides useful information for the phase reconstruction of low-grade complicated niobium and rare earth resources.</p></div>","PeriodicalId":605,"journal":{"name":"JOM","volume":"77 9","pages":"6443 - 6453"},"PeriodicalIF":2.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897091","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最新文献