Sumair Ahmed Soomro, Muhammad Irfan Jahanger, Maaz Ullah Khan, Yanchun Zhou, Shuai Fu, Detian Wan, Yiwang Bao, Qingguo Feng, Chunfeng Hu
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The microstructure and elemental map analysis results further confirmed that the five transition metals were successfully solid soluted at the M-sites of the hexagonal M<sub>4</sub>AlC<sub>3</sub> unit cell. The mean elemental compositions for M-site elements were achieved as Nb<sub>0.85</sub>Ti<sub>0.052</sub>Zr<sub>0.035</sub>Mo<sub>0.027</sub>Hf<sub>0.036</sub> and Nb<sub>0.847</sub>Ti<sub>0.051</sub>Zr<sub>0.043</sub>Mo<sub>0.025</sub>Ta<sub>0.033</sub> for MAX<sub>Hf</sub> and MAX<sub>Ta</sub> ceramics, respectively. The electrical and thermal conductivities of multielement solid solution MAX phases were decreased compared to pure Nb<sub>4</sub>AlC<sub>3</sub>. However, Mechanical properties were significantly increased with the solid solution of five transition metals. The fracture toughness, flexural strength, compressive strength and Vickers hardness (10 N) of MAX<sub>Hf</sub> and MAX<sub>Ta</sub> ceramics were achieved as 8.87 MPa m<sup>1/2</sup>, 448 MPa, 867 MPa, 6.5 GPa and 10.36 MPa m<sup>1/2</sup>, 557 MPa, 1039 MPa, 8.2 GPa, respectively. The enhanced mechanical properties suggest the effectiveness of the solid solution strengthening effect and provide new opportunities to further tailor the mechanical properties of the MAX phase ceramics.</p>","PeriodicalId":13903,"journal":{"name":"International Journal of Applied Ceramic Technology","volume":"21 6","pages":"4146-4155"},"PeriodicalIF":1.8000,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced properties of multi-element soluted (Nb0.8Ti0.05Zr0.05Mo0.05M0.05)4AlC3 (M = Hf, Ta) ceramics\",\"authors\":\"Sumair Ahmed Soomro, Muhammad Irfan Jahanger, Maaz Ullah Khan, Yanchun Zhou, Shuai Fu, Detian Wan, Yiwang Bao, Qingguo Feng, Chunfeng Hu\",\"doi\":\"10.1111/ijac.14816\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Recently multielements solid solution has shown significant improvement to the mechanical properties of parent MAX phases. 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The mean elemental compositions for M-site elements were achieved as Nb<sub>0.85</sub>Ti<sub>0.052</sub>Zr<sub>0.035</sub>Mo<sub>0.027</sub>Hf<sub>0.036</sub> and Nb<sub>0.847</sub>Ti<sub>0.051</sub>Zr<sub>0.043</sub>Mo<sub>0.025</sub>Ta<sub>0.033</sub> for MAX<sub>Hf</sub> and MAX<sub>Ta</sub> ceramics, respectively. The electrical and thermal conductivities of multielement solid solution MAX phases were decreased compared to pure Nb<sub>4</sub>AlC<sub>3</sub>. However, Mechanical properties were significantly increased with the solid solution of five transition metals. The fracture toughness, flexural strength, compressive strength and Vickers hardness (10 N) of MAX<sub>Hf</sub> and MAX<sub>Ta</sub> ceramics were achieved as 8.87 MPa m<sup>1/2</sup>, 448 MPa, 867 MPa, 6.5 GPa and 10.36 MPa m<sup>1/2</sup>, 557 MPa, 1039 MPa, 8.2 GPa, respectively. 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引用次数: 0
摘要
最近，多元素固溶技术已显示出对母体 MAX 相机械性能的显著改善。因此，在这项研究中，我们加入了五种不同半径的元素，以检验它们对 MAX 相性能的影响。利用火花等离子烧结技术成功合成了(Nb0.8Ti0.05Zr0.05Mo0.05Hf0.05)4AlC3 (MAXHf) 和 (Nb0.8Ti0.05Zr0.05Mo0.05Ta0.05)4AlC3 (MAXTa) 陶瓷。微观结构和元素图谱分析结果进一步证实，五种过渡金属成功固溶于六边形 M4AlC3 单胞的 M 位。在 MAXHf 和 MAXTa 陶瓷中，M 位元素的平均组成分别为 Nb0.85Ti0.052Zr0.035Mo0.027Hf0.036 和 Nb0.847Ti0.051Zr0.043Mo0.025Ta0.033。与纯 Nb4AlC3 相比，多元素固溶体 MAX 相的导电性和导热性都有所下降。然而，五种过渡金属固溶体的机械性能明显提高。MAXHf 和 MAXTa 陶瓷的断裂韧性、抗弯强度、抗压强度和维氏硬度（10 N）分别达到 8.87 MPa m1/2、448 MPa、867 MPa、6.5 GPa 和 10.36 MPa m1/2、557 MPa、1039 MPa、8.2 GPa。机械性能的提高表明了固溶强化效应的有效性，并为进一步定制 MAX 相陶瓷的机械性能提供了新的机遇。
Recently multielements solid solution has shown significant improvement to the mechanical properties of parent MAX phases. Therefore, in this work, five elements with different radii were incorporated to check the effect on properties of MAX phases. (Nb0.8Ti0.05Zr0.05Mo0.05Hf0.05)4AlC3 (MAXHf) and (Nb0.8Ti0.05Zr0.05Mo0.05Ta0.05)4AlC3 (MAXTa) ceramics were successfully synthesized using the spark plasma sintering technique. The microstructure and elemental map analysis results further confirmed that the five transition metals were successfully solid soluted at the M-sites of the hexagonal M4AlC3 unit cell. The mean elemental compositions for M-site elements were achieved as Nb0.85Ti0.052Zr0.035Mo0.027Hf0.036 and Nb0.847Ti0.051Zr0.043Mo0.025Ta0.033 for MAXHf and MAXTa ceramics, respectively. The electrical and thermal conductivities of multielement solid solution MAX phases were decreased compared to pure Nb4AlC3. However, Mechanical properties were significantly increased with the solid solution of five transition metals. The fracture toughness, flexural strength, compressive strength and Vickers hardness (10 N) of MAXHf and MAXTa ceramics were achieved as 8.87 MPa m1/2, 448 MPa, 867 MPa, 6.5 GPa and 10.36 MPa m1/2, 557 MPa, 1039 MPa, 8.2 GPa, respectively. The enhanced mechanical properties suggest the effectiveness of the solid solution strengthening effect and provide new opportunities to further tailor the mechanical properties of the MAX phase ceramics.
期刊介绍：
The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas:
Nanotechnology applications;
Ceramic Armor;
Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors);
Ceramic Matrix Composites;
Functional Materials;
Thermal and Environmental Barrier Coatings;
Bioceramic Applications;
Green Manufacturing;
Ceramic Processing;
Glass Technology;
Fiber optics;
Ceramics in Environmental Applications;
Ceramics in Electronic, Photonic and Magnetic Applications;
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