TaC对Ti(C<sub>0.7</sub>N<sub>0.3</sub>)基金属陶瓷的物相、显微结构和力学性能的影响

劳振勇; 郭伟明; 罗展鹏; 谭大旺; 林华泰

doi:10.13801/j.cnki.fhclxb.20211115.004

TaC对Ti(C_0.7N_0.3)基金属陶瓷的物相、显微结构和力学性能的影响

doi: 10.13801/j.cnki.fhclxb.20211115.004

广东工业大学　机电工程学院，广州 510006

基金项目: 广东省引进创新科研团队计划(2013G061)

详细信息

通讯作者:
郭伟明，博士，教授，博士生导师，研究方向为高性能陶瓷部件与加工(陶瓷刀具、陶瓷球等)、核能用先进陶瓷、超高温与高熵陶瓷　E-mail: guo1237@126.com

中图分类号: TH145.9
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出版历程
- 收稿日期: 2021-08-30
- 修回日期: 2021-11-08
- 录用日期: 2021-11-16
- 网络出版日期: 2021-11-16
- 刊出日期: 2022-08-22

Effect of TaC on phase, microstructure and mechanical properties of Ti(C_0.7N_0.3)-based cermets

School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China

摘要

摘要: 为了制备高硬度高韧性的Ti(C_0.7N_0.3)基金属陶瓷，采用1600℃真空无压烧结制备了含TaC的Ti(C_0.7N_0.3)-WC-Mo₂C-VC-AlN-Ni/Co系金属陶瓷，研究了不同TaC 含量(0wt%、5wt%、10wt%、15wt%)对金属陶瓷的物相、显微结构、力学性能的影响。结果表明，随着TaC含量增加，Ti(C_0.7N_0.3) (200)主峰逐渐向低角度偏移，环形相的厚度逐渐增大，金属陶瓷的维氏硬度和断裂韧性均先增大后减小。当TaC含量为10wt%时，核芯相细化，尺寸离散度最小，环形相发育更完整且均匀，金属陶瓷获得最高的维氏硬度和断裂韧性，分别为(17.79±0.15) GPa和(10.20±0.39) MPa·m^1/2。
- Ti(C_0.7N_0.3)基金属陶瓷 /
- TaC /
- 物相 /
- 显微结构 /
- 力学性能
Abstract: In order to prepare Ti(C_0.7N_0.3)-based cermets with high hardness and high toughness, Ti(C_0.7N_0.3)-WC-Mo₂C-VC-AlN-Ni/Co cermets containing TaC were prepared by vacuum pressureless sintering at 1600℃. The effects of different TaC content (0wt%, 5wt%, 10wt%, 15wt%) on the phase, microstructure and mechanical properties of cermets were investigated. The results show that with the increase of TaC content, the main peak of Ti(C_0.7N_0.3) (200) gradually shifts to a lower angle, the thickness of rim phase increase gradually and the Vickers hardness and fracture toughness of cermet firstly increased and then decreased. When 10wt% TaC is added, the core phase size of cermets is refined with the smallest, and the rim phase is more complete and uniform, leading to the maximum Vickers hardness ((17.79±0.15) GPa) and fracture toughness ((10.20±0.39) MPa·m^1/2) of cermet.
- Ti(C_0.7N_0.3)-based cermets /
- TaC /
- phase /
- microstructure /
- mechanical properties

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图 1 (a) 不同TaC含量的Ti(C_0.7N_0.3)基金属陶瓷的归一化XRD图谱；(b) 35°~43°范围内的XRD图谱

Figure 1. (a) Normalized XRD diffraction patterns of Ti(C_0.7N_0.3)-based cermets with different contents of TaC; (b) XRD patterns in the range of 35°-43°

下载: 全尺寸图片幻灯片

图 2 不同TaC含量的Ti(C_0.7N_0.3)基金属陶瓷的SEM-背散射电子成像(BSE)图像： (a) Ti(C_0.7N_0.3)；(b) 5wt%TaC/Ti(C_0.7N_0.3)；(c) 10wt%TaC/Ti(C_0.7N_0.3)；(d) 15wt%TaC/Ti(C_0.7N_0.3)

Figure 2. SEM-backscattered electron (BSE) images of Ti(C_0.7N_0.3)-based cermets with different amounts of TaC: (a) Ti(C_0.7N_0.3); (b) 5wt%TaC/Ti(C_0.7N_0.3); (c) 10wt%TaC/Ti(C_0.7N_0.3); (d) 15wt%TaC/Ti(C_0.7N_0.3)

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图 3 EDS线扫描Ti(C_0.7N_0.3)基金属陶瓷的陶瓷相主要元素的分布

Figure 3. Distribution of main elements in the ceramic phases of Ti(C_0.7N_0.3)-based cermets scanned by EDS line

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图 4 不同TaC含量的Ti(C_0.7N_0.3)基金属陶瓷的核芯相粒度分布

Figure 4. Particle size distribution of core phase of Ti(C_0.7N_0.3)-based cermets with different amounts of TaC

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图 5 不同TaC含量的Ti(C_0.7N_0.3)基金属陶瓷的力学性能

Figure 5. Mechanical properties of Ti(C_0.7N_0.3)-based cermets with different amounts of TaC

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图 6 不同TaC含量的Ti(C_0.7N_0.3)基金属陶瓷的裂纹扩展：(a) Ti(C_0.7N_0.3)；(b) 5wt%TaC/Ti(C_0.7N_0.3)；(c) 10wt%TaC/Ti(C_0.7N_0.3)；(d) 15wt%TaC/Ti(C_0.7N_0.3)

Figure 6. Crack propagation of Ti(C_0.7N_0.3)-based cermets with different amounts of TaC: (a) Ti(C_0.7N_0.3); (b) 5wt%TaC/Ti(C_0.7N_0.3); (c) 10wt%TaC/Ti(C_0.7N_0.3); (d) 15wt%TaC/Ti(C_0.7N_0.3)

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表 1 Ti(C_0.7N_0.3)基金属陶瓷试样的原料配比

Table 1. Raw material ratio of Ti(C_0.7N_0.3)-based cermets sample

Sample	Chemical composition/wt%
Sample	Ti(C_0.7N_0.3)	WC	Co	Ni	VC	Mo₂C	AlN	TaC
Ti(C_0.7N_0.3)	59	15	6.5	6.5	5	6.5	1.5	0
5wt%TaC/Ti(C_0.7N_0.3)	54	15	6.5	6.5	5	6.5	1.5	5
10wt%TaC/Ti(C_0.7N_0.3)	49	15	6.5	6.5	5	6.5	1.5	10
15wt%TaC/Ti(C_0.7N_0.3)	44	15	6.5	6.5	5	6.5	1.5	15

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表 2 不同TaC含量的Ti(C_0.7N_0.3)基金属陶瓷的密度和相对密度

Table 2. Density and relative density of Ti(C_0.7N_0.3)-based cermets with different TaC contents

Sample	Ti(C_0.7N_0.3)	5wt%TaC/Ti(C_0.7N_0.3)	10wt%TaC/Ti(C_0.7N_0.3)	15wt%TaC/Ti(C_0.7N_0.3)
Density/(g·cm⁻³)	6.44	6.54	6.90	6.79
Relative density/%	99.98	99.86	99.52	95.77

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参考文献(21)

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TaC对Ti(C_0.7N_0.3)基金属陶瓷的物相、显微结构和力学性能的影响

doi: 10.13801/j.cnki.fhclxb.20211115.004

通讯作者:
郭伟明，博士，教授，博士生导师，研究方向为高性能陶瓷部件与加工(陶瓷刀具、陶瓷球等)、核能用先进陶瓷、超高温与高熵陶瓷　E-mail: guo1237@126.com

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Effect of TaC on phase, microstructure and mechanical properties of Ti(C_0.7N_0.3)-based cermets

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TaC对Ti(C0.7N0.3)基金属陶瓷的物相、显微结构和力学性能的影响

doi: 10.13801/j.cnki.fhclxb.20211115.004

通讯作者: 郭伟明，博士，教授，博士生导师，研究方向为高性能陶瓷部件与加工(陶瓷刀具、陶瓷球等)、核能用先进陶瓷、超高温与高熵陶瓷 E-mail: guo1237@126.com

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Effect of TaC on phase, microstructure and mechanical properties of Ti(C0.7N0.3)-based cermets

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出版历程

目录

TaC对Ti(C_0.7N_0.3)基金属陶瓷的物相、显微结构和力学性能的影响

通讯作者:
郭伟明，博士，教授，博士生导师，研究方向为高性能陶瓷部件与加工(陶瓷刀具、陶瓷球等)、核能用先进陶瓷、超高温与高熵陶瓷　E-mail: guo1237@126.com

Effect of TaC on phase, microstructure and mechanical properties of Ti(C_0.7N_0.3)-based cermets