| The high-toughness mechanism of heterogeneous solid solution HfC-TaC-HfO2 composite ceramics | |
| Tan, ZY1; Xu GN(徐光楠)2; Peng, YB1; Wen, SY3 | |
| Corresponding Author | Tan, Z. Y.([email protected]) |
| Source Publication | COMPOSITES COMMUNICATIONS
 |
| 2024-11-01 | |
| Volume | 51Pages:6 |
| ISSN | 2452-2139 |
| Abstract | Homogenisation and low-temperature sintering of multicomponent ultra-high temperature ceramics (UHTCs) are crucial technologies for their applications. However, the potential of utilizing the heterogeneous solid solution between UHTCs as a means of toughening has been neglected. The current work proposes a novel inhomogeneous solid solution phase composed of isomorphic HfC and TaC, which is designed to induce additional fracture energy dissipation. This phase is achieved using an ingenious powder screening method combined with the introduction of HfO2 sintering additive. The hardness and fracture toughness of the composite ceramics reached 14.9 +/- 1.3 GPa and 6.5 +/- 0.4 MPa m(1/2), respectively. The toughening mechanism was studied using real two-dimensional structure stress simulation and density functional theory (DFT) calculations. Uneven valence electron concentration results in the ductile to brittle transition of Hf1-xTaxC. Crack deflection and bridging toughening mechanisms originate from the second phase stress of HfO2 particles and the heterogeneous matrix. This discovery will provide a noteworthy research direction for the design of high toughness multicomponent UHTCs. |
| Keyword | UHTC Toughening mechanism Solid solution TaC-HfC ceramics |
| DOI | 10.1016/j.coco.2024.102097 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:001328025400001 |
| WOS Keyword | HIGH TEMPERATURE CERAMICS ; TRANSITION ; HFC ; TAC |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Composites |
| Funding Project | Natural Science Foundation of Hunan Province of China[2024JJ6204] ; Natural Science Foundation of Hunan Province of China[2023JJ50182] |
| Funding Organization | Natural Science Foundation of Hunan Province of China |
| Classification | 二类/Q1 |
| Ranking | 2 |
| Contributor | Tan, Z. Y. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96908 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Hunan Univ Technol, Coll Mat & Adv Mfg, Zhuzhou 412007, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 3.Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China |
| Recommended Citation GB/T 7714 | Tan, ZY,Xu GN,Peng, YB,et al. The high-toughness mechanism of heterogeneous solid solution HfC-TaC-HfO2 composite ceramics[J]. COMPOSITES COMMUNICATIONS,2024,51:6.Rp_Au:Tan, Z. Y. |
| APA | Tan, ZY,徐光楠,Peng, YB,&Wen, SY.(2024).The high-toughness mechanism of heterogeneous solid solution HfC-TaC-HfO2 composite ceramics.COMPOSITES COMMUNICATIONS,51,6. |
| MLA | Tan, ZY,et al."The high-toughness mechanism of heterogeneous solid solution HfC-TaC-HfO2 composite ceramics".COMPOSITES COMMUNICATIONS 51(2024):6. |
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