Microstructure,Properties and Toughening of TiC-TiB<sub>2</sub> Fine-grained Composite Ceramics Prepared by Combustion Synthesis under High Gravity

Views : 0 下载量: 118 CSCD: 2

Export
Share
Collection
Album

Microstructure,Properties and Toughening of TiC-TiB₂ Fine-grained Composite Ceramics Prepared by Combustion Synthesis under High Gravity
Vol. 31, Issue 4, Pages: 295-298(2011)
Published： 2011 ，
DOI：

扫描看全文

[1]尹玉军,赵忠民,张龙,潘传增.超重力下燃烧合成TiC-TiB_2细晶复合陶瓷[J].特种铸造及有色合金,2011,31(04):295-298+393.

Yin Yujun, Zhao Zhongmin, Zhang Long, et al. Microstructure,Properties and Toughening of TiC-TiB₂ Fine-grained Composite Ceramics Prepared by Combustion Synthesis under High Gravity. [J]. Special Casting & Nonferrous Alloys 31(4):295-298(2011)
[1]尹玉军,赵忠民,张龙,潘传增.超重力下燃烧合成TiC-TiB_2细晶复合陶瓷[J].特种铸造及有色合金,2011,31(04):295-298+393. DOI：

Yin Yujun, Zhao Zhongmin, Zhang Long, et al. Microstructure,Properties and Toughening of TiC-TiB₂ Fine-grained Composite Ceramics Prepared by Combustion Synthesis under High Gravity. [J]. Special Casting & Nonferrous Alloys 31(4):295-298(2011) DOI：

摘要

采用超重力下燃烧合成工艺

以快速凝固方式制备出TiB2系列含量的TiC-TiB2细晶复合陶瓷。XRD、FESEM与EDS分析表明

随TiB2含量的增加

TiC-TiB2复合陶瓷基体从TiC微米球晶组织逐渐转化为TiB2小尺寸片晶组织

且对于TiB2含量为50%的TiC-TiB2复合陶瓷

可获得TiB2小尺寸片晶均匀镶嵌于TiC基体上的共晶组织。力学性能测试结果表明

TiB2的摩尔分数为50%的TiC-TiB2复合陶瓷因在凝固过程中发生共晶反应

陶瓷相对密度和硬度均达到最高值（分别为98.6%和18.4GPa）

并且因TiB2小尺寸片晶在裂纹扩展时所诱发的裂纹偏转、桥接及片晶拔出增韧机制的协同作用

TiB2的含量为66.7%的TiC-TiB2复合陶瓷具有最高的断裂韧度（13.4MPa·m0.5）。

Abstract

With the help of combustion synthesis under high gravity

TiC-TiB2 fine-grained composite ceramics with different TiB2 contents were prepared by rapid solidification method.Microstructure and mechanical properties of the prepared composite ceramics were investigated by XRD（X-ray diffraction）

FESEM（field emission scanning electron microscope） and EDS（energy dispersive spectrometer） as well as tensile testing.The results reveal that

with increasing in TiB2 content

microstructure of the TiC-TiB2 composite ceramics is composed of those from fine TiC spherical grains to fine TiB2 platelet structure

whereas when TiB2 content reaches 50%（in atom fraction）

ceramics consist of eutectic structure where small-sized TiB2 platelets are embedded in TiC matrix.Relative density and Vickers hardness of TiC-50TiB2 reach up to maximum value（as 98.6% and 18.4GPa

respectively） as a result of eutectic reaction during solidification

meanwhile

TiC-66.7TiB2 ceramics exhibit maximum fracture toughness of 13.4MPa·m1/2 as a result of the cooperative action of crack deflection

crack-bridging and pull-out toughening from fine TiB2 platelets.

关键词

TiC-TiB2复合陶瓷燃烧合成超重力结构转化增韧细晶强化

Keywords

TiC-TiB2 Composite CeramicsCombustion SynthesisHigh GravityStructure TransformationTougheningFine Grain Strengthening

references

Alert me when the article has been cited

提交

相关文章

Microstructure and Mechanical Properties of In-situ Al₂O₃/YSZ Composites Ceramics Prepared by Combustion Synthesis under High Gravity

Preparation and Microstructural Evolution of Al₂O₃/ZrO₂（4Y） Eutectic Composite Ceramic Large Bulk Plates

Composition,microstructures and properties of Al₂O₃/ZrO₂（4Y）prepared by combustion synthesis under high gravity

Influence of Additive on Al₂O₃/ZrO₂（4Y） Composites Prepared by Combustion Synthesis under High Gravity

Composition,Microstructure and Properties of Al₂O₃/ZrO₂（4Y）Composites Prepared by Combustion Synthesis under High Gravity

相关作者

Pan Chuanzeng 军械工程学院先进材料研究所

Zhao Zhongmin 军械工程学院先进材料研究所

Zhang Long 军械工程学院先进材料研究所

Zhang Jing 军械工程学院先进材料研究所

Song Yalin 军械工程学院先进材料研究所

Zhao Zhongmin1 军械工程学院先进材料研究所

Yang Quan1 军械工程学院先进材料研究所; 武汉军械士官学校特种车辆教研室

Liu Chunhua2 武汉军械士官学校特种车辆教研室

相关机构

Institute of Advanced Materials,Ordnance Engineering College

Teaching and Researching Section of Special Vehicle,Wuhan Ordnance Petty Office Institute of P..A,Wuhan

Institute of Advanced Materials, Ordnance Engineering College

Shijiazhuang Ordnance Engineering College)

Ordnance Engineering College,,) Ye Minghui Xjn Wentong Du Xinkang Wang Jianjiang Zhang Long

⁰