Synthesis of damage-tolerant Cu-matrix composites with nacre-inspired laminate-reticular hierarchical architecture via tuning compositional wettability. (September 2020)

• Record Type: Journal Article
• Authors: Hu, Zhi-Jie; Guo, Rui-Fen; Chen, Shuo-Ming; Jin, Quan; Shen, Ping
• Is Part Of: Scripta materialia. Number 186(2020)
• Page Start: 312
• Page End: 316
• Publication Date: 2020-09
• Subjects: Bio-inspired -- Hierarchical structure -- Damage tolerance -- Metal−ceramic composites -- Freeze casting; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.05.029
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We constructed a nacre-inspired laminate-reticular hierarchical architecture in Cu/(TiC−Cr3 C2 ) composites by tuning the wettability between loose freeze-cast ceramic lamellae and Cu melt. This unique architecture takes full advantage of superb intrinsic strength of the ceramic particles and toughness of the metal, stimulating multiple extrinsic toughening mechanisms such as synergistic deformation of the metal and ceramic layers, ductile-ligament bridging and multi-cracking mode. As a consequence, the resultant composites containing ~30 vol% ceramics exhibited exceptional damage-tolerant properties with a fracture toughness of 62.6 ± 1.0 MPa⋅m 1/2 and a bending strength of 639 ± 27 MPa. Graphical abstract: Image, graphical abstract