In-situ crystalline Cr3C2 and amorphous SiO2 dual-particles reinforced NiCr-based composites

Guangmin Hu; Yanfeng Han; Sida Liu; Biao Yu; Wenqi Tang; Dong Li; Hui Xing; Xiangfa Liu; Jiao Zhang; Baode Sun

Materials & Design (Jun 2023)

In-situ crystalline Cr3C2 and amorphous SiO2 dual-particles reinforced NiCr-based composites

Guangmin Hu,
Yanfeng Han,
Sida Liu,
Biao Yu,
Wenqi Tang,
Dong Li,
Hui Xing,
Xiangfa Liu,
Jiao Zhang,
Baode Sun

Affiliations

Guangmin Hu: Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
Yanfeng Han: Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China; Corresponding author.
Sida Liu: Institute for Advanced Technology, Shandong University, No. 17923 Jingshi Road, Jinan 250061, Shandong, China
Biao Yu: Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
Wenqi Tang: Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
Dong Li: Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
Hui Xing: Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
Xiangfa Liu: Key Lab for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, No. 17923 Jingshi Road, Jinan 250061, Shandong, China
Jiao Zhang: Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China; State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
Baode Sun: Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China; State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China

Journal volume & issue: Vol. 230
p. 111997

Abstract

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Strength and ductility of structural materials are mutually exclusive in general due to the strength-ductility trade-off. Using in-situ pyrolysis of polycarbosilane in NiCr powder green compacts, we fabricated NiCr-based composites with micro-sized crystalline Cr3C2 and amorphous SiO2 dual-particles. Tensile tests show that the NiCr-based composites have a combination of high strength and ductility with the yield strength, ultimate tensile strength and ductility as 449 MPa, 838 MPa and 20.5%, respectively. The amorphous SiO2 and crystalline Cr3C2 particles exhibit plastic deformation and transgranular fracture, respectively, under tensile stress. Besides solid solution strengthening, the generation and annihilation behavior of dislocations at amorphous/crystalline interface and the strain hardening of the ceramic particles by hindering the movement of dislocations mutually contributes to the combination of excellent strength and ductility of our composites.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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