航空材料学报2026，Vol.46Issue(9)：107-117,11.DOI:10.11868/j.issn.1005-5053.2025.000212
TiB2/Ti2AlC多相协同增强TiAl基复合材料组织调控与强韧化机制
Microstructure regulation and strengthening-toughening mechanism of TiAl matrix composites synergistically reinforced by TiB2/Ti2AlC multiphases
摘要
Abstract
Ti48Al2Cr2Nb-0.5GO-xTiB2(x is mass fraction/%)composites synergistically reinforced by TiB2 and Ti2AlC are fabricated via spark plasma sintering.The effects of TiB2 content on the microstructural evolution and mechanical properties of the composites at room and high temperatures are systematically investigated.The results reveal that the addition of TiB2 significantly refines the lamellar colony size and promotes the transformation of the matrix microstructure from fully lamellar to duplex microstructure,which effectively improves the microstructural homogeneity of the material.The composite with 0.3%TiB2 exhibits optimal comprehensive mechanical properties,with a compressive strength of 1870 MPa and compressive strain of 27.5%at room temperature,respectively.When the TiB2 content is 0.2%,the high-temperature tensile strength at 850℃is approximately 500 MPa,representing a 32.5%improvement compared with the base alloy.Micromechanical analysis demonstrates that the enhanced performance mainly originates from grain refinement strengthening and second-phase strengthening jointly induced by TiB2 and Ti2AlC.During deformation,the reinforcing phases cooperatively regulate plastic deformation behavior and fracture processes through mechanisms including microcrack deflection,interfacial debonding,and stress redistribution,thus optimizing the strength-ductility balance of the material.关键词
放电等离子烧结/TiAl复合材料/颗粒增强/强韧化机制Key words
spark plasma sintering/TiAl composite/particle reinforcement/strengthening-toughening mechanism分类
矿业与冶金引用本文复制引用
陈龙苏,邓哲,邢秋玮,张新房,柳培,陈占兴,薛彦庆..TiB2/Ti2AlC多相协同增强TiAl基复合材料组织调控与强韧化机制[J].航空材料学报,2026,46(9):107-117,11.基金项目
河南省重点研发专项(251111231400) （251111231400）
河南省自然科学基金(252300420066) （252300420066）
河南省国际科技合作项目(252102520046) （252102520046）
陕西省重大研发计划(2025CY-JJQ-18) （2025CY-JJQ-18）
中国博士后基金(2024MD753996) （2024MD753996）
材料成形与模具技术全国重点实验室开放基金(P2024-017) （P2024-017）
