Effects of high-temperature annealing on the microstructure and properties of C/ZrC composites prepared by reactive melt infiltration

被引：17

作者：

Chen, Si'an ^{[1
]}

Ji, Hongliang ^{[2
]}

Li, Yong ^{[1
]}

Li, Guangde ^{[3
]}

Mei, Min ^{[4
]}

Hu, Haifeng ^{[1
]}

机构：

[1] Natl Univ Def Technol, Sci & Technol Adv Ceram Fibers & Composites Lab, Changsha 410073, Hunan, Peoples R China

[2] China Areodynam Res & Dev Ctr, Computat Aerdynam Inst, Mianyang 621000, Peoples R China

[3] Equipment Acad Rocket Force, Res Inst 5, Beijing 100094, Peoples R China

[4] Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composites Lab, Beijing 100076, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 686卷

基金：

中国国家自然科学基金;

关键词：

C/ZrC composites; Reactive melt infiltration; High-temperature annealing; Mechanical properties; Microstructure; Ablation resistance; RELATIVE LOW-TEMPERATURE; FABRICATION; PRECURSOR;

D O I：

10.1016/j.msea.2016.12.059

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

C/ZrC composites prepared by reactive melt infiltration at 1900 degrees C contained similar to 4.2 vol% residual alpha-Zr which was harmful to the high-temperature mechanical properties and ablation resistance. Thus, the composites were heat-treated for 1 h from 1200 degrees C to 2000 degrees C. The residual a-Zr amount was only 0.6 vol% after annealing at 2000 degrees C, indicating that high temperature promoted the diffusion and reaction of Zr and C to consume alpha-Zr. C/ZrC composites had the optimum flexural properties of 192 MPa and 17.7 GPa after annealing at 1600 degrees C. The ablation resistance was improved after high-temperature annealing, and the mass loss rate and linear recession rate decreased as the temperature increased, which were 0.0021 g/s and 0.0008 mm/s respectively after annealing at 2000 degrees C.

引用

页码：41 / 45

页数：5

共 17 条

[1] Influence of pyrocarbon amount in C/C preform on the microstructure and properties of C/ZrC composites prepared via reactive melt infiltration [J].