{"title":"纳米TiB晶须提高TA15基复合材料高温强度和塑性的机理","authors":"Siyu Tian , Yu Zhang , Ziyuan Jia , Qiyuan Yu , Huan Zhang , Lujun Huang , Shuai Wang , Lin Geng","doi":"10.1016/j.coco.2025.102559","DOIUrl":null,"url":null,"abstract":"<div><div>This study employs low-energy ball milling with hot press sintering technique to fabricate network-structure TA15 matrix composites with TiB<sub>2</sub> of different sizes (5 μm, 0.5 μm, and 100 nm). For 5 μm or 0.5 μm TiB<sub>2</sub>, in-situ synthesized TiB whisker (TiBw) exhibit rod-like morphology with aspect ratio of 7.8 or 7.5, forming quasi-continuous networks at primary β phase boundaries to induce heterogeneous nucleation of primary α (α<sub>p</sub>). Their room-temperature yield strength and elongation are 890 MPa and 7.7 %, 896 MPa and 8.2 %, respectively. Meanwhile, their high-temperature strength at 600 °C is 518 MPa and 543 MPa. However, when the size of TiB<sub>2</sub> is reduced to 100 nm, TiBw exhibited a much smaller diameter accompanied by a remarkably high average aspect ratio of 16.2, leading to the formation of a needle-like morphology. The morphological transformation of TiBw is governed by its nucleation sites and the concentration gradient of B atomic diffusion. This needle TiBw/TA15 composite exhibits a very good room-temperature yield strength of 1135 MPa and high-temperature properties of 589 MPa in strength and 16.4 % in fracture strain at 600 °C. The enhanced high-temperature elongation stems from TA15 matrix softening, which reduces crack propagation resistance and promotes crack deflection into the matrix.</div></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":"59 ","pages":"Article 102559"},"PeriodicalIF":7.7000,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Mechanism of nanoscale TiB whisker improving the high-temperature strength and plasticity of TA15 matrix composite\",\"authors\":\"Siyu Tian , Yu Zhang , Ziyuan Jia , Qiyuan Yu , Huan Zhang , Lujun Huang , Shuai Wang , Lin Geng\",\"doi\":\"10.1016/j.coco.2025.102559\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study employs low-energy ball milling with hot press sintering technique to fabricate network-structure TA15 matrix composites with TiB<sub>2</sub> of different sizes (5 μm, 0.5 μm, and 100 nm). For 5 μm or 0.5 μm TiB<sub>2</sub>, in-situ synthesized TiB whisker (TiBw) exhibit rod-like morphology with aspect ratio of 7.8 or 7.5, forming quasi-continuous networks at primary β phase boundaries to induce heterogeneous nucleation of primary α (α<sub>p</sub>). Their room-temperature yield strength and elongation are 890 MPa and 7.7 %, 896 MPa and 8.2 %, respectively. Meanwhile, their high-temperature strength at 600 °C is 518 MPa and 543 MPa. However, when the size of TiB<sub>2</sub> is reduced to 100 nm, TiBw exhibited a much smaller diameter accompanied by a remarkably high average aspect ratio of 16.2, leading to the formation of a needle-like morphology. The morphological transformation of TiBw is governed by its nucleation sites and the concentration gradient of B atomic diffusion. This needle TiBw/TA15 composite exhibits a very good room-temperature yield strength of 1135 MPa and high-temperature properties of 589 MPa in strength and 16.4 % in fracture strain at 600 °C. The enhanced high-temperature elongation stems from TA15 matrix softening, which reduces crack propagation resistance and promotes crack deflection into the matrix.</div></div>\",\"PeriodicalId\":10533,\"journal\":{\"name\":\"Composites Communications\",\"volume\":\"59 \",\"pages\":\"Article 102559\"},\"PeriodicalIF\":7.7000,\"publicationDate\":\"2025-08-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Composites Communications\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2452213925003122\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, COMPOSITES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Composites Communications","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2452213925003122","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, COMPOSITES","Score":null,"Total":0}
Mechanism of nanoscale TiB whisker improving the high-temperature strength and plasticity of TA15 matrix composite
This study employs low-energy ball milling with hot press sintering technique to fabricate network-structure TA15 matrix composites with TiB2 of different sizes (5 μm, 0.5 μm, and 100 nm). For 5 μm or 0.5 μm TiB2, in-situ synthesized TiB whisker (TiBw) exhibit rod-like morphology with aspect ratio of 7.8 or 7.5, forming quasi-continuous networks at primary β phase boundaries to induce heterogeneous nucleation of primary α (αp). Their room-temperature yield strength and elongation are 890 MPa and 7.7 %, 896 MPa and 8.2 %, respectively. Meanwhile, their high-temperature strength at 600 °C is 518 MPa and 543 MPa. However, when the size of TiB2 is reduced to 100 nm, TiBw exhibited a much smaller diameter accompanied by a remarkably high average aspect ratio of 16.2, leading to the formation of a needle-like morphology. The morphological transformation of TiBw is governed by its nucleation sites and the concentration gradient of B atomic diffusion. This needle TiBw/TA15 composite exhibits a very good room-temperature yield strength of 1135 MPa and high-temperature properties of 589 MPa in strength and 16.4 % in fracture strain at 600 °C. The enhanced high-temperature elongation stems from TA15 matrix softening, which reduces crack propagation resistance and promotes crack deflection into the matrix.
期刊介绍:
Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.