Acta Materialia最新文献_第8页

A novel approach to coating for improving the comprehensive high-temperature service performance of TiAl alloys 改善钛铝合金高温综合服役性能的新型涂层方法

IF 8.3 1区材料科学

Acta Materialia Pub Date : 2024-10-28 DOI: 10.1016/j.actamat.2024.120500

Yanxun Mu , Yongfeng Liang , Jiaqi Sheng , Chenyang Zhang , Zheng Guo , Gang Yang , Tielong Sun , Yongsheng Wang , Junpin Lin

{"title":"A novel approach to coating for improving the comprehensive high-temperature service performance of TiAl alloys","authors":"Yanxun Mu , Yongfeng Liang , Jiaqi Sheng , Chenyang Zhang , Zheng Guo , Gang Yang , Tielong Sun , Yongsheng Wang , Junpin Lin","doi":"10.1016/j.actamat.2024.120500","DOIUrl":"10.1016/j.actamat.2024.120500","url":null,"abstract":"<div><div>TiAl alloys, with half the density of nickel-based superalloys, are highly suitable for aerospace applications requiring lightweight materials. However, they tend to form a nonprotective mixed oxide film on their surface at high temperatures. This oxide film is prone to cracking, which can lead to long-term high-temperature oxidation surface degradation, thereby reducing their high-temperature creep and fatigue resistance. Surface cracks on the oxide film further aggravated the brittleness of the TiAl intermetallic compounds after high-temperature exposure. While coatings are typically applied to promote the formation of dense oxides for surface protection, they primarily enhance oxidation resistance. However, this improvement comes at the cost of reducing the high-temperature creep and fatigue resistance and the room-temperature plasticity of TiAl alloys. This study introduced an electroless coating method to deposit a Pt coating, approximately 200 nm thick, on the surface of TiAl alloys. During high-temperature applications, the Pt dispersed as nanoparticles within the oxide layer, enhancing the oxide's plasticity. This oxide structure considerably improved the high-temperature creep and fatigue properties of TiAl alloys, while enhancing their room-temperature tensile properties after oxidation. This approach offers a novel strategy for designing surface coatings for high-temperature components.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"283 ","pages":"Article 120500"},"PeriodicalIF":8.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142519925","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}

引用次数: 0

Enhanced energy storage performance of 0.85BaTiO3–0.15Bi(Mg0.5Hf0.5)O3 films via synergistic effect of defect dipole and oxygen vacancy engineering 通过缺陷偶极和氧空位工程的协同效应提高 0.85BaTiO3-0.15Bi(Mg0.5Hf0.5)O3 薄膜的储能性能

IF 8.3 1区材料科学

Acta Materialia Pub Date : 2024-10-28 DOI: 10.1016/j.actamat.2024.120522

Weijie Fu , Yi-qin Lu , Qiuyang Han , Tian-Yi Hu , Tingzhi Duan , Yupeng Liu , Shao-Dong Cheng , Yanzhu Dai , Ming Liu , Chunrui Ma

{"title":"Enhanced energy storage performance of 0.85BaTiO3–0.15Bi(Mg0.5Hf0.5)O3 films via synergistic effect of defect dipole and oxygen vacancy engineering","authors":"Weijie Fu , Yi-qin Lu , Qiuyang Han , Tian-Yi Hu , Tingzhi Duan , Yupeng Liu , Shao-Dong Cheng , Yanzhu Dai , Ming Liu , Chunrui Ma","doi":"10.1016/j.actamat.2024.120522","DOIUrl":"10.1016/j.actamat.2024.120522","url":null,"abstract":"<div><div>Dielectric capacitors are widely used in electronic devices due to their ultra-fast charge/discharge rate and ultra-high power density, but their lower energy density and poor thermal stability limit their further application. In contrast to the traditional strategy of suppressing defects, this work combines oxygen vacancies with defect dipoles to improve the breakdown strength and polarization behavior of ferroelectric films. Low concentration of oxygen vacancies and defect dipoles can trap charge carriers and increase breakdown strength, but if the concentration is too high, it can easily make films prone to breakdown. Moreover, the defect dipoles can reduce <em>P<sub>r</sub></em> by providing intrinsic restoring force for polarization switching, while excessive defect dipoles and oxygen vacancies can pin domain walls and increase <em>P<sub>r</sub></em>. By delicately controlling the concentration of oxygen vacancies and defect dipoles in the film, the BT-BMH film deposited at 0.135 mbar achieved the maximum breakdown strength and slim <em>P</em>-<em>E</em> loops, inducing the energy density to reach 108.9 J·cm<sup>-3</sup> with an efficiency of 79.6 % at room temperature and excellent thermal stability in the wide temperature range of -100∼350 °C with the energy density of 69.1 J·cm<sup>-3</sup>. This work reveals the important significance of reasonable defect control for improving energy storage performance and provides an effective method for developing high-performance dielectric capacitors.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"283 ","pages":"Article 120522"},"PeriodicalIF":8.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142520119","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}

引用次数: 0

New insights into the partitioning behavior of Mo in nickel-based superalloys and its effect on microstructure using CALPHAD-assisted phase field modeling 利用 CALPHAD 辅助相场建模对镍基超合金中钼的分配行为及其对微观结构影响的新认识

IF 8.3 1区材料科学

Acta Materialia Pub Date : 2024-10-28 DOI: 10.1016/j.actamat.2024.120510

Zexin Wang , Chuanxin Liang , Xiangdong Ding , Dong Wang

{"title":"New insights into the partitioning behavior of Mo in nickel-based superalloys and its effect on microstructure using CALPHAD-assisted phase field modeling","authors":"Zexin Wang , Chuanxin Liang , Xiangdong Ding , Dong Wang","doi":"10.1016/j.actamat.2024.120510","DOIUrl":"10.1016/j.actamat.2024.120510","url":null,"abstract":"<div><div>Elemental partitioning behaviors are critical in determining the high-temperature capabilities of superalloys. In multi-component superalloys, these behaviors are influenced by the competition among elements. This study examines the effects of Cr concentration on elemental distribution behaviors and γ′ evolution in Ni–10Al–4Mo–<em>x</em>Cr superalloys using CALPHAD-informed phase field modeling. Our simulations show that Mo's preference shifts from γ′ precipitates to γ matrix as Cr concentration increases. This shift results from the competitive interactions between Mo and Cr atoms at the corner sites of Ni<sub>3</sub>Al, reducing Mo's solubility in γ′ precipitates. Further analysis reveals that with increasing Cr concentration, more Mo is displaced by Cr at the B sites of γ′-A<sub>3</sub>B. Additionally, the Mo content in γ′ precipitate decreases with rising Cr content, resulting in an abnormal rise in the γ′ volume fraction based on Mo mass balance. Moreover, γ′ coarsening rate initially rises and then falls with increasing Cr concentration in an inverted “V” shape, a change attributable to variations in the γ matrix supersaturation. These findings provide new insights into Mo distribution in nickel-based superalloys and offer guidance for designing superalloys with improved microstructural stability.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"282 ","pages":"Article 120510"},"PeriodicalIF":8.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142520120","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}

引用次数: 0

Enabling quantitative analysis of in situ TEM experiments: A high-throughput, deep learning-based approach tailored to the dynamics of dislocations 实现原位 TEM 实验的定量分析：基于深度学习的高通量方法，专为位错动力学量身定制

IF 8.3 1区材料科学

Acta Materialia Pub Date : 2024-10-28 DOI: 10.1016/j.actamat.2024.120455

Hengxu Song , Binh Duong Nguyen , Kishan Govind , Dénes Berta , Péter Dusán Ispánovity , Marc Legros , Stefan Sandfeld

{"title":"Enabling quantitative analysis of in situ TEM experiments: A high-throughput, deep learning-based approach tailored to the dynamics of dislocations","authors":"Hengxu Song , Binh Duong Nguyen , Kishan Govind , Dénes Berta , Péter Dusán Ispánovity , Marc Legros , Stefan Sandfeld","doi":"10.1016/j.actamat.2024.120455","DOIUrl":"10.1016/j.actamat.2024.120455","url":null,"abstract":"<div><div><em>In situ</em> TEM is by far the most commonly used microscopy method for imaging dislocations, i.e., line-like defects in crystalline materials. However, quantitative image analysis so far was not possible, implying that also statistical analyses were strongly limited. In this work, we created a deep learning-based digital twin of an <em>in situ</em> TEM straining experiment, additionally allowing to perform matching simulations. As application we extract spatio-temporal information of moving dislocations from experiments carried out on a Cantor high entropy alloy and investigate the universality class of plastic strain avalanches. We can directly observe “stick–slip motion” of single dislocations and compute the corresponding avalanche statistics. The distributions turn out to be scale-free, and the exponent of the power law distribution exhibits independence on the driving stress. The introduced methodology is entirely generic and has the potential to turn meso-scale TEM microscopy into a truly quantitative and reproducible approach.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"282 ","pages":"Article 120455"},"PeriodicalIF":8.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142519927","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}

引用次数: 0

Boosting Low-E electro-strain via high-electronegativity B-site substitution in lead-free K0.5Na0.5NbO3-based ceramics 通过在无铅 K0.5Na0.5NbO3 基陶瓷中取代高电负性 B 晶位来增强低电应变

IF 8.3 1区材料科学

Acta Materialia Pub Date : 2024-10-28 DOI: 10.1016/j.actamat.2024.120520

Jie Wang, Binquan Wang, Geng Huangfu, Hongjie Zhang, Yiping Guo

{"title":"Boosting Low-E electro-strain via high-electronegativity B-site substitution in lead-free K0.5Na0.5NbO3-based ceramics","authors":"Jie Wang, Binquan Wang, Geng Huangfu, Hongjie Zhang, Yiping Guo","doi":"10.1016/j.actamat.2024.120520","DOIUrl":"10.1016/j.actamat.2024.120520","url":null,"abstract":"<div><div>Lead-free piezoelectric actuators emerge as promising substitutes for their lead-containing counterparts to address environmental concerns. However, they often confront a trade-off between low driving electric fields and high electro-strain. Herein, a novel strategy to boost electro-strain under low electric fields is proposed by doping high-electronegativity B-site atoms into perovskite potassium sodium niobate-based ceramics. Our findings reveal that high-electronegativity B-site atoms elevate the covalency of B-O bonding, softening the short-range repulsion and introducing local multiphase coexistence. This leads to more nanoscale domain structures and lower coercive field, thereby enabling large strains to be produced at lower electric fields. Notably, a substantial 0.2 % bipolar electro-strain and 0.1 % unipolar electro-strain under 10 kV cm<sup>-1</sup> is achieved in Sr, Sb co-doped potassium sodium niobate ceramics, with a broad working frequency and temperature range, as well as excellent fatigue resistance. This study unveils innovative insights into designing lead-free piezoelectric ceramics with remarkable electro-strain performance and low driving electric field, promising a significant advancement in lead-free piezoelectric materials science and piezoelectric actuators.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"282 ","pages":"Article 120520"},"PeriodicalIF":8.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142519669","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}

引用次数: 0

Unveiling the mechanisms of ultra-low thermal and oxygen-ion conductivity in entropy-stabilized ferroelastic rare-earth tantalates 揭示熵稳定铁弹性稀土钽酸盐的超低热导率和氧离子导率机制

IF 8.3 1区材料科学

Acta Materialia Pub Date : 2024-10-28 DOI: 10.1016/j.actamat.2024.120523

Jun Wang , Qianqian Jin , Peng Wu , ZiFan Zhao , Zhenhua Ge , Xiaoyu Chong , Jing Feng

{"title":"Unveiling the mechanisms of ultra-low thermal and oxygen-ion conductivity in entropy-stabilized ferroelastic rare-earth tantalates","authors":"Jun Wang , Qianqian Jin , Peng Wu , ZiFan Zhao , Zhenhua Ge , Xiaoyu Chong , Jing Feng","doi":"10.1016/j.actamat.2024.120523","DOIUrl":"10.1016/j.actamat.2024.120523","url":null,"abstract":"<div><div>Most current thermal and environmental barrier coating materials, even with high relative densities, exhibit high oxygen-ion conductivity, which accelerates the oxidation of the substrate and ultimately results in coating failure. Herein, high-entropy rare-earth tantalates ((6RE<sub>1/6</sub>)TaO<sub>4</sub>) are presented with lattice distortion that causes local disruption of the ordered stacking of oxygen-ions and cations, thereby resulting in reduced oxygen-ion and thermal conductivities. The oxygen-ion conductivity of (6RE<sub>1/6</sub>)TaO<sub>4</sub> decreased by three to five orders of magnitude compared with that of 8YSZ and was further decreased by the high-entropy effect compared with that of single-RE RETaO<sub>4</sub> from 600 to 900 ℃, which is the result of strong bond strength, severe lattice distortion, high oxygen vacancy clusters and a high concentration of immobile vacancies. Furthermore, the intrinsic thermal conductivity of (6RE<sub>1/6</sub>)TaO<sub>4</sub> is 14.3∼40.5 % less than single-RE RETaO<sub>4</sub> and ∼65.3 % lower than that of 8YSZ at 1200 °C. It also presents lower intrinsic thermal conductivity across the temperature range of 100 to 1200 °C. This is the result of scattering by Umklapp processes, oxygen vacancies, lattice distortions, ferroelastic domains and dislocations. Entropy-stabilized (6RE<sub>1/6</sub>)TaO<sub>4</sub> also has excellent thermal stability and mechanical properties, thereby making it a promising thermal and environmental barrier coating material.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"283 ","pages":"Article 120523"},"PeriodicalIF":8.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142520209","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}

引用次数: 0

Electron work function guided tailoring of (W4-x, Mx)C4 /doped Ni matrix interfacial bonding: Insights from first-principles calculations 电子功函数引导下的(W4-x, Mx)C4 /掺杂镍基体界面键合：第一原理计算的启示

IF 8.3 1区材料科学

Acta Materialia Pub Date : 2024-10-26 DOI: 10.1016/j.actamat.2024.120511

P. Aghdasi, D.Y. Li

{"title":"Electron work function guided tailoring of (W4-x, Mx)C4 /doped Ni matrix interfacial bonding: Insights from first-principles calculations","authors":"P. Aghdasi, D.Y. Li","doi":"10.1016/j.actamat.2024.120511","DOIUrl":"10.1016/j.actamat.2024.120511","url":null,"abstract":"<div><div>Heavy tungsten carbide (WC) may cause inhomogeneous distributions in WC-metal matrix composite hardfacing overlays, thus negatively affecting its performance as reinforcement. WC can be lightened by partially substituting W with lighter metals, e.g., Mo and Cr, while maintaining its strength. However, the bonding between modified WC and matrix metals such as nickel (a typical metal-matrix for overlays) is uncertain. This article reports a study on the interfacial bonding between (W<sub>4-x</sub>, M<sub>x</sub>)C<sub>4</sub> (<em>M</em>=Mo or Cr) and Ni matrix via first-principle calculations. Different atomic interactions i.e., metal-metal and metal-carbon interactions, at the interface were studied to understand the interfacial bonding through analyses of electron work function (EWF), electron localization function, electronic density of states, bond order, and net charge. It was demonstrated that the lighter (W<sub>4-x</sub>, M<sub>x</sub>)C<sub>4</sub> carbides exhibit strong bonding with Ni, comparable to or even stronger than that of WC/Ni interface, and the interfacial bonding includes covalent, ionic and metallic bond components. It is demonstrated that the interfacial bonding can be tuned by doping elements in the Ni matrix with different EWFs, e.g., Mn, Cu, Au, Pt, and Se. Efforts have been made to verify a hypothesis that EWF is an indicator, which can be used to guide selecting effective dopants for tailoring the interfacial bond strength.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"283 ","pages":"Article 120511"},"PeriodicalIF":8.3,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142519670","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}

引用次数: 0

Unusual deformation mechanisms evoked by hetero-zone interaction in a heterostructured FCC high-entropy alloy 异质结构 FCC 高熵合金中异质区相互作用诱发的异常变形机制

IF 8.3 1区材料科学

Acta Materialia Pub Date : 2024-10-26 DOI: 10.1016/j.actamat.2024.120516

Jiahao Li , Xinkai Ma , Kejie Lu , Yanfei Wang , Yuntian Zhu

{"title":"Unusual deformation mechanisms evoked by hetero-zone interaction in a heterostructured FCC high-entropy alloy","authors":"Jiahao Li , Xinkai Ma , Kejie Lu , Yanfei Wang , Yuntian Zhu","doi":"10.1016/j.actamat.2024.120516","DOIUrl":"10.1016/j.actamat.2024.120516","url":null,"abstract":"<div><div>Understanding the synergistic mechanical effects of heterostructured materials remains challenging due to the complexities in the underlying deformation mechanisms, which are usually diverse, activated at different length scales and possibly interacting. Here, we unravel a deformation fundamental for heterostructures: in addition to the direct contribution on strength, hetero-zone interaction and the development of long-range internal stress could assist in evoking extra plastic mechanisms that are difficult to activate in their homogeneous counterparts. Specifically, the deformation of a heterostructure in Al<sub>0.1</sub>CoCrFeNi alloy, featuring nanostructured hard lamellae embedded in fine-grained soft matrix, is taken as an example for study. Drawing from experimental insights, the long-range internal stress buildup at elastoplastic transition stage due to intense dislocation pile-ups against hetero-zone boundary, which increases yield strength significantly, is theoretically analyzed. At the plastic stage, the high internal stress helps to activate phase transformation in the fine-grained zones, and the inter-zone constraint leads to form dispersed stable strain bands in the nanostructured zones. These extra mechanisms, together with enhanced deformation twinning, facilitate work hardening and coordinate the strain partitioning between zones, imparting improved ductility at high flow stress. These findings indicate a principle for heterostructural design: introducing strong hetero-zone interaction to enhance internal stress and thereby invoke new deformation mechanisms.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"282 ","pages":"Article 120516"},"PeriodicalIF":8.3,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142520122","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}

引用次数: 0

Corrigendum to “Critical impacts of thermodynamic instability and short-range order on deformation mechanisms of VCoNi medium-entropy alloy” [Acta Materialia 277 (2024) 120190] 热力学不稳定性和短程有序性对钴镍中熵合金变形机制的关键影响》[Acta Materialia 277 (2024) 120190]更正

IF 8.3 1区材料科学

Acta Materialia Pub Date : 2024-10-25 DOI: 10.1016/j.actamat.2024.120490

T.H. Chou , W.P. Li , L.Y. Zhu , F. Zhu , X.C. Li , J. Huang , Y.X. Wang , R. Zhou , W.Y. Chen , J.H. Luan , Y.L. Zhao , Z.X. Wu , F.R. Chen , J.C. Huang , P.K. Liaw , X.L. Wang , T. Yang

引用次数: 0

Strategic lattice manipulation in transition metal nitrides for improved solubility 在过渡金属氮化物中进行晶格策略性处理以提高溶解度

IF 8.3 1区材料科学

Acta Materialia Pub Date : 2024-10-25 DOI: 10.1016/j.actamat.2024.120514

Rebecca Janknecht , Nikola Koutná , Katharina Weiss , Eleni Ntemou , Szilárd Kolozsvári , Paul H. Mayrhofer , Rainer Hahn

{"title":"Strategic lattice manipulation in transition metal nitrides for improved solubility","authors":"Rebecca Janknecht , Nikola Koutná , Katharina Weiss , Eleni Ntemou , Szilárd Kolozsvári , Paul H. Mayrhofer , Rainer Hahn","doi":"10.1016/j.actamat.2024.120514","DOIUrl":"10.1016/j.actamat.2024.120514","url":null,"abstract":"<div><div>In this study, we propose a new concept for achieving metastable ternary transition metal nitride solid solutions, focusing on face centered cubic (fcc) structured Ti(N,B) as a model system. Combining non-reactive magnetron sputtering with computational analysis, we develop a microalloying strategy to manipulate the metallic sublattice, thereby influencing the solubility of B in the non-metal sublattice. We show that imposed tensile strain on the fcc-TiN lattice facilitates the solubility of B, with a 1.5 % strain enabling the incorporation of ∼28.5 at.% B at the non-metal sublattice. Conversely, compressive strain hinders the formation of the fcc-Ti(N,B) solid solution, highlighting the importance of lattice manipulation in controlling solubility. At the same time, our experimental findings reveal that adding larger atoms, such as Zr, to the metal sublattice enhances the solubility of B in fcc-TiN more effectively (∼2 at.% Zr proves to be sufficient to solute 10 at.% B in the fcc-TiN lattice) than smaller atoms, like Cr or similar-sized Ti atoms. The size effect of the alloying atoms on the B solubility is further supported by radial distribution function analysis, showing lower local lattice distortions for Zr compared to Cr.</div></div>","PeriodicalId":238,"journal":{"name":"Acta Materialia","volume":"283 ","pages":"Article 120514"},"PeriodicalIF":8.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142490050","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}

引用次数: 0