Effects of interphases on mechanical properties of CVI-mini SiCf/SiC composites

被引：3

作者：

Zhao Wen-qing ^{[1
,2
]}

Qi Zhe ^{[3
,4
]}

Lyu Xiao-xu ^{[3
,4
]}

Jiao Jian ^{[3
,4
]}

Ma Zhuang ^{[1
,2
]}

Zhu Shi-zhen ^{[1
,2
]}

机构：

[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

[2] Natl Key Lab Sci & Technol Mat Shock & Impact, Beijing 100081, Peoples R China

[3] AECC Beijing Inst Aeronaut Mat, Surface Engn Div, Beijing 100095, Peoples R China

[4] AECC Beijing Inst Aeronaut Mat, Natl Key Lab Adv Composites, Beijing 100095, Peoples R China

来源：

CAILIAO GONGCHENG-JOURNAL OF MATERIALS ENGINEERING | 2021年 / 49卷 / 07期

关键词：

interphase; surface roughness; mini-composite; tensile strength; CHEMICAL-VAPOR-DEPOSITION; BN; GROWTH;

D O I：

10.11868/j.issn.1001-4381.2020.000157

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

BN and BN/SiC interphases were prepared on the surface of SiC tows by chemical vapor infiltration (CVI). The tows were furthered deposited a thick SiC layer to form mini SiC composites, whose tensile properties were tested. The surface and cross-section of interphase and mini-composites were observed by SEM. The surface roughness of the interphase was evaluated by AFM. The crystal structure of interphase was characterized by XRD and TEM. The results show that the BN interphase prepared by the CVI method follows Stranski-Krastanov growth mode,possessing smooth surface and weak bonds with the matrix. After heat treatment, the crystallinity and the surface roughness of BN interphase increase, and the bond with the matrix is also slightly enhanced. The BN/SiC interphase follows V-W growth mode, possessing rough surface and weak bonds with the matrix. The tensile strength of mini-composites with BN, HBN and BN/SiC interphases are 970, 1050 MPa, and 1720 MPa, respectively.

引用

页码：71 / 77

页数：7

共 35 条

[1] Effects of SiC interphase by chemical vapor deposition on the properties of C/ZrC composite prepared via precursor infiltration and pyrolysis route [J].