Effect of C Addition on the Microstructure and Fracture Properties of In Situ Laminated Nb/Nb5Si3 Composites

被引：0

作者：

Zeng, Delu ^{[1
]}

Xiao, Lairong ^{[1
,2
]}

Xu, Shaofu ^{[1
]}

Yu, Huali ^{[1
]}

Zhang, Yu ^{[1
]}

Yu, Chenxu ^{[1
]}

Zhao, Xiaojun ^{[1
,2
]}

Cai, Zhenyang ^{[1
,2
]}

Li, Wei ^{[3
]}

机构：

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

[2] Cent South Univ, Key Lab Nonferrous Met Mat Sci & Engn, Minist Educ, Changsha 410083, Peoples R China

[3] Cent South Univ, Powder Met Res Inst, Changsha 410083, Peoples R China

来源：

MATERIALS | 2023年 / 16卷 / 16期

基金：

中国国家自然科学基金;

关键词：

laminated Nb/Nb5Si3 composite; spark plasma sintering; orientation relationship; fracture toughness; compressive strength; MECHANICAL-PROPERTIES; OXIDATION RESISTANCE; HEAT-TREATMENT; NB; BEHAVIOR; ZR; HF;

D O I：

10.3390/ma16165637

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

//Nb-ss and alpha-Nb5Si3 phases were detected. Meanwhile, Nb2C was observed, and the crystal forms of Nb5Si3 changed in the C-doped composites. Furthermore, micron-sized and nanosized Nb2C particles were found in the Nbss layer. The orientation relationship of Nb2C phase and the surrounding Nb-ss was [001](Nbss)//[010](Nb2C), (200) (Nbss)//(101) (Nb2C.) Additionally, with the addition of C, the compressive strength of the composites, at 1400 degrees C, and the fracture toughness increased from 310 MPa and 11.9 MPa .m(1/2) to 330 MPa and 14.2 MPa .m(1/2), respectively; the addition of C mainly resulted in solid solution strengthening.

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页数：13

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