Journal of Materials Science & Technology最新文献

{"title":"Nanoscale insights in core–shell structure formation and property regulation of isotropic pyrolytic carbon materials","authors":"Caixiang Xiao, Fei Zhao, Xu Yang, Yuanxiao Zhao, Qiang Song, Qingliang Shen","doi":"10.1016/j.jmst.2024.09.045","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.09.045","url":null,"abstract":"Isotropic pyrolytic carbon (IPC) is renowned for its robust mechanical, biological, and tribological properties. However, the current mechanisms for modulating IPC microstructure are insufficient to achieve higher performance. Herein, this study provides nanoscale insights into the formation and property regulation of the core–shell structure of the IPC, integrating simulation and experimental approaches. Large-scale reactive molecular dynamics simulations elucidate the microstructural evolution and assembly processes from precursors to nanoparticles and intertwined graphene networks. Simulation process characterization enable versatile adjustment of IPC microstructural features and one-step deposition of hybrid structures with disordered cores and ordered shell layers. Compared to Pyrolytic carbon (PyC) with laminated graphene arrangement, the prepared hybrid structure enables rapid assembly of large-size standalone carbon components. Moreover, the hybrid architecture effectively improves the core–shell phase connection and significantly increases the interfacial shear stress within the intertwined graphene shell layers. Consequently, it greatly improves load transfer efficiency and enhances crack-bridging toughening effect. The endeavor to establish precise microstructure formation and property regulation in IPC materials promises to steer high-performance carbon materials toward distinct developmental trajectories.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"16 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deciphering the multi-electron redox chemistry of metal-sulfide electrode toward advanced aqueous Cu ion storage","authors":"Zhenxin Zhao, Zonglin Yi, Rong Niu, Jiajun Chen, Rajesh Pathak, Yongzhen Wang, Jeffrey W Elam, Xiaomin Wang","doi":"10.1016/j.jmst.2024.08.071","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.08.071","url":null,"abstract":"While neutral aqueous metal batteries, featuring cost-effectiveness and non-flammability, hold significant potential for large-scale energy storage, their practical application is hampered by the limited specific capacity of cathode materials (less than 500 mAh g⁻¹). Herein, capacity-oriented CoS₂ and rate-optimized Co₉S₈ cathodes are developed based on the aqueous copper ion system. The charge-storage mechanism is systematically investigated through a series of ex-situ tests and density functional theory calculations, focusing on the reversible transitions of Co₉S₈→Cu₇S₄→Cu₉S₅/Cu_1.8S and CoS₂→Cu₇S₄→Cu₂S, which are associated with the redox reactions of Cu²⁺/Cu⁺‖Co²⁺/Co and Cu²⁺/Cu⁺‖S₂²⁻/S²⁻, respectively. The electrochemical results show that CoS₂ can exhibit a superior capacity of 619 mAh g⁻¹ at 1 A g⁻¹ after 400 cycles, while Co₉S₈ maintains an outstanding rate performance of 497 mAh g⁻¹ at 10 A g⁻¹ (the retention rate is 95% compared to 521 mAh g⁻¹ at 1 A g⁻¹). As a proof of concept, an advanced CoS₂//Zn hybrid aqueous battery demonstrates a working voltage of 1.20 V and a specific energy of 663 Wh kg_cathode⁻¹. This work provides an alternative direction for developing sulfide cathodes in energetic aqueous metal batteries.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"18 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase separation in hexagonal α phase during lamellar formation of TiAl alloys and its effect on subsequent phase transformations","authors":"Yonghao Yu, Hongchao Kou, Tingting Zhao, Zilong Zhang, Yarong Wang, Xiaoxuan Xu, Peixuan Li, Mingxiang Zhu, Zhihong Wu, William Yi Wang, Jinshan Li","doi":"10.1016/j.jmst.2024.10.013","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.10.013","url":null,"abstract":"TiAl alloys with the (α₂ + γ) lamellar structure are highly valued for their excellent high-temperature strength and creep resistance. Understanding the formation mechanism of the lamellar structure is crucial for tuning the microstructure and properties. This work investigates the formation of lamellar structure in Ti-48Al-7Nb-2.5V-1Cr alloy, revealing the presence of hcp-based long-period superstructure (hcp-LPS) as a metastable phase during lamellar formation. The identification of hcp-LPS demonstrates that the necessary solute enrichment for the formation of γ lamellae occurs on the hexagonal α matrix, implying that phase separation of α → Al-rich α lamellae + Al-depleted α lamellae is the first step of lamellar formation. Once phase separation is completed, all subsequent phase transitions occur within the Al-rich α lamellae. Additionally, the formation of twin lamellae is further discussed. The formation of the twin lamellae occurs sequentially. Pre-existing lamella promotes the formation of later lamella by inducing solute enrichment in its surrounding region, and then the successive slip of Shockley partial dislocations with opposite Burgers vectors ensures special stacking of later lamellae. These findings not only contribute to the fundamental understanding of spinodal mechanisms in hexagonal crystals, but also provide novel insights into the formation of twin lamellae.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"24 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142563075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fundamental study on the construction of anti-wear drug delivery system through the design of titanium surface morphology","authors":"Tong Ding, Yanfang Zhang, Yuankun Hou, Lei Zhou, Jianxing Zhang, Tengfei Wu, Zhiguo Xing, Sefei Yang","doi":"10.1016/j.jmst.2024.10.012","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.10.012","url":null,"abstract":"The durability of dental implant carrier coatings is of paramount importance for the expeditious and predictable osseointegration process. The present work is based on a bionic micro/nano hierarchy structure, which consists of titanium surface microstructures and their internal TiO₂ nanotubes (TNTs) with drug-carrying capacity. This effectively increases the wear resistance of the drug-carrying coating on the titanium surface. In comparison to untextured samples, the wear volume and wear depth of the optimal texture group are markedly diminished, resulting in a significant enhancement of wear resistance. This improvement was primarily attributed to the smaller contact area of the microstructure. Concurrently, the microstructure serves to safeguard the TNTs from damage during friction. The hydrophilic biomimetic anti-wear micro/nano hierarchies demonstrated the capacity to promote MC3T3-E1 cell adhesion and proliferation, while also exhibiting no cytotoxic effects. Moreover, the micro/nano hierarchical structure can be directly applied to the surface of commercialized implants. In simulated clinical conditions, the implant was inserted into a fresh Bama porcine mandible, and the structure of the drug-loading coatings remained intact. This structure enhances the abrasion resistance of the drug coating while minimizing alterations to the original treatment process of the implant, which is of great significance in the clinical application of implant-loaded drug delivery.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"42 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A universal descriptor to determine the effect of solutes in segregation at grain boundaries","authors":"Xin Li, Peitao Liu, Wang Gao, Xing-Qiu Chen, Qing Jiang","doi":"10.1016/j.jmst.2024.10.014","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.10.014","url":null,"abstract":"The control of solute segregation at grain boundaries is of significance in engineering alloy properties. However, there is currently a lack of a physics-informed predictive model for estimating solute segregation energies. Here we propose novel electronic descriptors for grain-boundary segregation based on the valence, electronegativity and size of solutes. By integrating the non-local coordination number of surfaces, we build a predictive analytic framework for evaluating the segregation energies across various solutes, grain-boundary structures, and segregation sites. This framework uncovers not only the coupling rule of solutes and matrices, but also the origin of solute-segregation determinants, which stems from the d- and sp-states hybridization in alloying. Our scheme establishes a novel picture for grain-boundary segregation and provides a useful tool for the design of advanced alloys.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"67 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing strength and ductility synergy through heterogeneous laminated structure design in high-entropy alloys","authors":"Longfei Zeng, Jinghui Zhang, Xu Lu, Shaoyu Li, Pingan Jiang","doi":"10.1016/j.jmst.2024.10.011","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.10.011","url":null,"abstract":"Heterogeneous laminated structure (HLS) design offers new opportunities to enhance the mechanical performance of high-entropy alloys (HEAs) through synergistic effects from heterogeneity. However, it remains challenging to introduce the HLS into HEAs via severe plastic deformation due to their strong work-hardening capacity. In this study, a specially designed multi-level HLS, characterized by alternatively stacked micro-grained soft CoCrFeNi layers and nanostructured ultra-hard Al_0.3CoCrFeNi layers containing a three-phase microstructure (composed of nanograined face-centered cubic matrix, (Al, Ni)-rich B2 precipitates, and Cr-rich <em>σ</em> precipitates), is controllably introduced into FCC HEAs via a conventional thermo–mechanical processing involving hot-pressing, cold-rolling, and annealing. Meanwhile, thermo–mechanical processing induces Al element diffusion across the layer interface, resulting in the formation of an interfacial transition layer and the establishment of a strong interface bonding between the neighboring CoCrFeNi and Al_0.3CoCrFeNi layers. As a result, the multi-level HLSed CoCrFeNi/Al_0.3CoCrFeNi composite exhibits a yield strength as high as 1127±25.4 MPa while maintaining a large fracture elongation (up to (26.3±2.4)%). Such an excellent strength–ductility synergy surpasses that of most previously reported high-performance monolithic bulk CoCrFeNi and Al_0.3CoCrFeNi HEAs prepared through careful chemical composition optimization and/or thermo–mechanical processing. Strong hetero-deformation induced strengthening benefited from the apparent microstructural/microhardness difference and the strong interface bonding between the neighbouring CoCrFeNi and Al_0.3CoCrFeNi layers, together with simultaneous activation of multiple strain hardening mechanisms containing mechanical twinning, stacking faults and precipitation strengthening, is responsible for the excellent strength–ductility combination. This multi-level HLS and its fabrication strategy provide an enlightening way to develop strong and ductile HEAs and can also be applied to high-performance designs of other metallic materials.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"14 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-scaled heterostructure enables superior strength–ductility combination of a CoCrFeMnN compositionally-complex alloy","authors":"Haizheng Pan, Ye Yuan, Yuliang Yang, Zhufeng He, Shuang Jiang, Mingwei Zhu, Weiye Chen, Nan Jia","doi":"10.1016/j.jmst.2024.10.015","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.10.015","url":null,"abstract":"Compositionally-complex alloys (CCAs) with the face-centered cubic (fcc) structure exhibit excellent fracture toughness and stable mechanical property across a broad temperature range from cryogenic to room temperatures. However, yield strength of those alloys is usually low, making them difficult to meet the demands of practical engineering application. In a prototype CCA with the nominal chemical composition of Co₁₀Cr₁₀Fe₄₉Mn₃₀N₁ (atom percent), a multi-scaled heterostructure from sample to atomic scales was obtained by performing triaxial cyclic compression and short-term annealing on the blocky alloy. The material exhibits a heterogeneous distribution of strain at the sample scale. At the grain scale, dense twins and twin–twin network, laths featured with local chemical order as well as dislocation cells jointly hinder plastic deformation. At the nanoscale, the chemical order within grains also impedes dislocation motion. During plastic deformation, different sample positions within the heterogeneous material and various regions at each position undergo coordinated deformation, resulting in significant hetero-deformation induced strengthening. Simultaneously, the continuously activated dislocations, stacking faults and nano-twins lead to a high yield strength of 1020 MPa in the material while maintaining a fracture elongation of 30%. This study provides new insights for the design and development of high-performance metallic materials.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"24 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of water content on the corrosion behavior of NiCu low alloy steel embedded in compacted GMZ bentonite","authors":"Madhusudan Dhakal, Xin Wei, Hari Bhakta Oli, Nan Chen, Yupeng Sun, Durga Bhakta Pokharel, Qiying Ren, Junhua Dong, Wei Ke","doi":"10.1016/j.jmst.2024.08.070","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.08.070","url":null,"abstract":"Buffer material and metal disposal containers are the key engineering barriers in the geological disposal of high-level radioactive waste. The durability of disposal containers largely depends on the water content in buffer material. This work focused on investigating the corrosion evolution of NiCu low alloy steel in compacted GMZ bentonite with different water contents for 270 d by using weight loss, electrochemical measurements, and various methods for analyzing corrosion products. As the water content increased from 13% to 20%, the water in the bentonite transformed from an unsaturated to a critical saturated state, and the corrosion rate of NiCu steel clearly increased. In these two systems, the oxygen could migrate to the thin liquid film on the steel surface through the air pores in the bentonite in the gas phase and undergo cathodic reduction. Meanwhile, it oxidized the ferrous hydrolysis products into ferric corrosion products and formed a rust layer, which could block the diffusion of oxygen. At that moment, the cathodic process of NiCu steel corrosion changed to rust reduction. When the water content continually increased to 30% and 40%, the compacted bentonite was in a saturation state, and the corrosion rate of NiCu steel was significantly decreased. This was because most pores among the bentonite particles were occupied by a large amount of free water, which hindered the diffusion of oxygen and inhibited its cathodic reduction. Furthermore, it restrained the oxidation of ferrous corrosion products, which greatly weakened the cathodic depolarization of rust, leading to the cathodic process being dominated by the hydrogen evolution reaction.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"1 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic inhibition to dissolution corrosion by de-twinning and precipitation in alumina-forming austenitic steel exposed to lead-bismuth eutectic with 10-8 wt.% oxygen at 600°C","authors":"Decang Zhang, Xiaoxin Zhang, Jun Zhang, Hao Ren, Zhonghui Liao, Xian Zeng, Qingzhi Yan","doi":"10.1016/j.jmst.2024.10.009","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.10.009","url":null,"abstract":"This work investigated the original microstructure of cold-worked alumina-forming austenitic steel, along with its precipitation and dissolution corrosion behaviors in lead-bismuth eutectic with 10^-8 wt.% oxygen at 600°C, using solution-annealed steel for comparison. Anomalously, cold-worked steel presented milder corrosion compared to solution-annealed steel, with average corrosion depths of 314.3 and 401.0 μm after 1700 h exposure. Cold working-induced de-twinning transformed the annealing twin boundaries into normal high-angle grain boundaries (NGBs), increasing NGBs proportion from 36% to 89%. The increased NGBs provided more nucleation sites for intergranular barriers composed of alternate NiAl and M₂₃C₆ precipitates, thus better obstructing the dissolution attack.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"24 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-situ nitrogen-doped carbon nanotube-encapsulated Co9S8 nanoparticles as self-supporting bifunctional air electrodes for zinc-air batteries","authors":"Qihao Wu, Heju Gao, Jiahui Jiang, Ting Zhao, Shuai Liu, Chunyan Wu, Guancheng Xu, Li Zhang","doi":"10.1016/j.jmst.2024.09.046","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.09.046","url":null,"abstract":"A flexible air electrode with excellent activity and stability is essential for flexible zinc-air batteries. In this study, we report the rational design of nitrogen-doped carbon nanotube-encapsulated Co₉S₈ nanoparticles on carbon cloth (Co₉S₈/NCNTs/CC), serving as self-supporting air electrodes for both liquid-state and flexible zinc-air batteries. The Co₉S₈/NCNTs/CC-1 exhibited a half-wave potential of 0.86 V for oxygen reduction reaction (ORR) and achieved a current density of 10 mA cm⁻² for oxygen evolution reaction (OER) at a voltage of only 1.52 V. The well-constructed nanotube on carbon cloth facilitates mass diffusion and electron transfer, while enhancing the mechanical flexibility of the material. Density functional theory (DFT) calculations suggested that the synergistic interaction between Co₉S₈ and NCNTs effectively enhanced the bifunctional electrocatalytic performance of the material. Liquid-state and flexible zinc-air batteries assembled with Co₉S₈/NCNTs/CC-1 demonstrated outstanding charge-discharge capabilities and long-term stability.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"19 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}