Effects of TiB<sub>2</sub> Particles on the Microstructure Evolution and Mechanical Properties of B<sub>4</sub>C/TiB<sub>2</sub> Ceramic Composite
B<sub>4</sub>C/TiB<sub>2</sub> ceramic composites reinforced with three size scales (average particle size: 7 μm, 500 nm, and 50 nm) of TiB<sub>2</sub> were prepared by using a pressureless sintering furnace at 2100 °C under Ar atmosphere for 60 min. The results d...
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doaj-540447d1f1c1417ab5ba3088675b94002021-09-26T00:36:22ZengMDPI AGMaterials1996-19442021-09-01145227522710.3390/ma14185227Effects of TiB<sub>2</sub> Particles on the Microstructure Evolution and Mechanical Properties of B<sub>4</sub>C/TiB<sub>2</sub> Ceramic CompositeHaiyan Niu0Yu Zhu1Ning You2Yangwei Wang3Huanwu Cheng4Dujun Luo5Mengying Tang6Jiamin Zhang7Science and Technology on Complex and System Simulation Laboratory, Beijing 100072, ChinaBeijing Institute of Aerospace Control Devices, Beijing 100039, ChinaScience and Technology on Complex and System Simulation Laboratory, Beijing 100072, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaB<sub>4</sub>C/TiB<sub>2</sub> ceramic composites reinforced with three size scales (average particle size: 7 μm, 500 nm, and 50 nm) of TiB<sub>2</sub> were prepared by using a pressureless sintering furnace at 2100 °C under Ar atmosphere for 60 min. The results demonstrated that during the sintering process, TiB<sub>2</sub> located on the boundaries between different B<sub>4</sub>C grains could inhibit the grain growth which improved the mass transport mechanism and sintering driving force. A semi-coherent interface between B<sub>4</sub>C and SiC was found, which is supposed to help to reduce the interface energy and obtain good mechanical properties of the B<sub>4</sub>C/TiB<sub>2</sub> ceramic composite. On sample cooling from sintering temperature to room temperature, the residual tensile stress fields formed at the TiB<sub>2</sub> interfaces owning to the thermo-elastico properties mismatched, which might have contributed to increase the ability of the sample to resist crack propagation. The results showed that the relative density, Vickers hardness, and fracture toughness of the composite with 20 wt.% submicron and 10 wt.% nano-TiB<sub>2</sub> were significantly improved, which were 98.6%, 30.2 GPa, and 5.47 MPa·m<sup>1/2</sup>, respectively.https://www.mdpi.com/1996-1944/14/18/5227pressureless sinteringB<sub>4</sub>C-TiB<sub>2</sub>particle sizemicrostructuremicrostructure evolution |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Haiyan Niu Yu Zhu Ning You Yangwei Wang Huanwu Cheng Dujun Luo Mengying Tang Jiamin Zhang |
spellingShingle |
Haiyan Niu Yu Zhu Ning You Yangwei Wang Huanwu Cheng Dujun Luo Mengying Tang Jiamin Zhang Effects of TiB<sub>2</sub> Particles on the Microstructure Evolution and Mechanical Properties of B<sub>4</sub>C/TiB<sub>2</sub> Ceramic Composite Materials pressureless sintering B<sub>4</sub>C-TiB<sub>2</sub> particle size microstructure microstructure evolution |
author_facet |
Haiyan Niu Yu Zhu Ning You Yangwei Wang Huanwu Cheng Dujun Luo Mengying Tang Jiamin Zhang |
author_sort |
Haiyan Niu |
title |
Effects of TiB<sub>2</sub> Particles on the Microstructure Evolution and Mechanical Properties of B<sub>4</sub>C/TiB<sub>2</sub> Ceramic Composite |
title_short |
Effects of TiB<sub>2</sub> Particles on the Microstructure Evolution and Mechanical Properties of B<sub>4</sub>C/TiB<sub>2</sub> Ceramic Composite |
title_full |
Effects of TiB<sub>2</sub> Particles on the Microstructure Evolution and Mechanical Properties of B<sub>4</sub>C/TiB<sub>2</sub> Ceramic Composite |
title_fullStr |
Effects of TiB<sub>2</sub> Particles on the Microstructure Evolution and Mechanical Properties of B<sub>4</sub>C/TiB<sub>2</sub> Ceramic Composite |
title_full_unstemmed |
Effects of TiB<sub>2</sub> Particles on the Microstructure Evolution and Mechanical Properties of B<sub>4</sub>C/TiB<sub>2</sub> Ceramic Composite |
title_sort |
effects of tib<sub>2</sub> particles on the microstructure evolution and mechanical properties of b<sub>4</sub>c/tib<sub>2</sub> ceramic composite |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2021-09-01 |
description |
B<sub>4</sub>C/TiB<sub>2</sub> ceramic composites reinforced with three size scales (average particle size: 7 μm, 500 nm, and 50 nm) of TiB<sub>2</sub> were prepared by using a pressureless sintering furnace at 2100 °C under Ar atmosphere for 60 min. The results demonstrated that during the sintering process, TiB<sub>2</sub> located on the boundaries between different B<sub>4</sub>C grains could inhibit the grain growth which improved the mass transport mechanism and sintering driving force. A semi-coherent interface between B<sub>4</sub>C and SiC was found, which is supposed to help to reduce the interface energy and obtain good mechanical properties of the B<sub>4</sub>C/TiB<sub>2</sub> ceramic composite. On sample cooling from sintering temperature to room temperature, the residual tensile stress fields formed at the TiB<sub>2</sub> interfaces owning to the thermo-elastico properties mismatched, which might have contributed to increase the ability of the sample to resist crack propagation. The results showed that the relative density, Vickers hardness, and fracture toughness of the composite with 20 wt.% submicron and 10 wt.% nano-TiB<sub>2</sub> were significantly improved, which were 98.6%, 30.2 GPa, and 5.47 MPa·m<sup>1/2</sup>, respectively. |
topic |
pressureless sintering B<sub>4</sub>C-TiB<sub>2</sub> particle size microstructure microstructure evolution |
url |
https://www.mdpi.com/1996-1944/14/18/5227 |
work_keys_str_mv |
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