Microstructure and mechanical properties of in-situ laminated Nb/Nb5Si3 composites

被引：11

作者：

Yu, C. X. ^{[1
]}

Zhao, X. J. ^{[1
]}

Xiao, L. R. ^{[1
]}

Cai, Z. Y. ^{[1
]}

Zhang, B. ^{[1
]}

Guo, L. ^{[1
]}

机构：

[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

来源：

MATERIALS LETTERS | 2017年 / 209卷

基金：

中国国家自然科学基金;

关键词：

Laminates; Microstructure; Fracture toughness; Compressive strength; HIGH-TEMPERATURE STRENGTH; FRACTURE-TOUGHNESS; BEHAVIOR; ALLOYS; MO;

D O I：

10.1016/j.matlet.2017.08.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The in-situ laminated Nb/Nb5Si3 composite was prepared by spark plasma sintering. The microstructures and mechanical properties of the laminated Nb/Nb5Si3 composite were investigated in present work. It could be found that, alternant distribution microstructures of Nb-ss and Nb5Si3 layers were observed after sintering. The Nb/Nb5Si3 composite exhibited fracture toughness of 11.2 MPa.m(1/2), and the predicted fracture toughness was estimated by the Ashby model. Moreover, the deviation of the experimental value from the predicted value was discussed. In addition, the compressive strength of the in-situ laminated Nb/Nb5Si3 composite was measured at 1400 degrees C and compared with that of the unidirectionally solidified Nb-17.5Si alloy. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：606 / 608

页数：3

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