Work

Strength and Toughness Mechanisms of Layered Ti 3 AlC 2 Reinforced TiAl 3 ‐Based Composites

Year: 2026

Type: article

Abstract: Revealing the unique strength and toughness mechanisms of Ti 3 AlC 2 in the TiAl 3 matrix is a challenge of great scientific and practical significance. Ti 3 AlC 2 /TiAl 3 composites were fabricated by in situ reaction which using TiC, TiH 2 , and Al powder as the raw materials. Then, the compressive properties and fracture toughness of the composites were tested. The as‐prepared Ti 3 AlC 2 /TiAl 3 composite with 30% mass fraction of the reinforcement exhibits excellent comprehensive mechanical performance. Its compressive strength, compressive strain and K IC are 1647 ± 21 MPa, 7.1 ± 0.1% and 3.83 ± 0.05 MPa·m 1/2 , respectively, which are 193%, 203%, and 143% higher than those of the pure TiAl 3 matrix. It is demonstrated that the layered Ti 3 AlC 2 reinforcements enhance the strength of Ti 3 AlC 2 /TiAl 3 composites through microdeformations such as interlayer tearing, kinking, shearing, and tensile fracture; Simultaneously, they increase the toughness of the Ti 3 AlC 2 /TiAl 3 composites by generating new interfaces via interlayer sliding and the formation of cleavage planes or cleavage steps.

Source: Advanced Engineering Materials

DOI: 10.1002/adem.71401

Authors: Lina Gao, Shufeng Li, Xin Zhang, Bo Li

Institution: Xi'an University of Technology

Language: English

Topic: MXene and MAX Phase Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funders: National Natural Science Foundation of China, China Postdoctoral Science Foundation, Education Department of Shaanxi Province

Awards: G2989518591, G3262200899, G675968322, G7273990248, G7318307682