Tailoring layered Csf/SiBCN composites with pseudoplastic fracture behavior: Strengthening and toughening mechanisms

Author:

Dou Wenhao12,Li Daxin12,Wang Bingzhu12,Cai Delong3,Yang Zhihua124,Jia Dechang12,Riedel Ralf5,Qin Shaohua6,Zhou Yu12

Affiliation:

1. Institute for Advanced Ceramics School of Materials Science and Engineering Harbin Institute of Technology Harbin China

2. Key Laboratory of Advanced Structural‐Functional Integration Materials and Green Manufacturing Technology Harbin Institute of Technology Harbin China

3. International Joint Laboratory of Advanced Nanomaterials of Heilongjiang Province College of Materials Science and Chemical Engineering Harbin Engineering University Harbin China

4. Chongqing Research Institute of HIT Chongqing China

5. Technische Universität Darmstadt Institut für Materialwissenschaft Darmstadt Germany

6. School of Materials Science and Engineering Harbin Institute of Technology Harbin China

Abstract

AbstractThe layering process using phenolic resin coupled with pressureless sintering technique was explored to prepare short carbon fiber‐reinforced SiBCN composites (Csf/SiBCN). The effect of phenolic resin content on the microstructure and mechanical properties of Csf/SiBCN was mainly studied. Results suggest that the addition of phenolic resin can appropriately improve density and flexural strength and reduce total pore volume of the composites because phenolic resin can partly consolidate SiBCN powders to promote shaping via low‐temperature pressureless sintering. As the phenolic resin content increases, the fracture behavior changes from delamination fracture to monolithic fracture, thereby reducing fracture displacement. The reason for this performance is that the interlayer bonding is enhanced to hinder crack propagation along the layers.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

Materials Chemistry,Ceramics and Composites

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