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Effect of the Addition of Ultrafine Powders on the Microstructure and Mechanical Properties of TiCN-Based Cermets
Y. Yang1,2, W. Dang1,2, J. Liu1,2, H. Zhang1,2, S. Gu1,2, C. Lei1,2, Y. Chen1,2
1 Fujian Key Laboratory of Functional Materials and Applications, Xiamen University of Technology, Xiamen 361024, Fujian, P.R. China
2 Xiamen Key Laboratory for Power Metallurgy Technology and Advanced Materials, Xiamen University of Technology, Xiamen 361024, Fujian, P.R. China
received July 18, 2021, received in revised form November 2, 2021, accepted November 7, 2021
Vol. 13, No. 1, Pages 15-22 DOI: 10.4416/JCST2021-00011
Abstract
In this study, ultrafine titanium carbonitride (TiCN) powders were prepared with an improved carbothermal reduction method. The microstructure and mechanical properties of TiCN-based cermets fabricated with different contents of ultrafine powders were investigated by means of scanning electron microscopy, X-ray diffraction, Vickers hardness and three-point bending tests. With the addition of ultrafine TiCN powder, the "black core-grey rim" phase was refined, and the "white core-grey rim" phase was gradually produced. The optimum content of ultrafine TiCN powder is 20 wt%. The cermets' hardness, bending strength and fracture toughness were increased by 2.5 %, 7.9 % and 20.4 %, respectively, compared to those without the addition of the ultrafine TiCN powders. The enhanced mechanical properties were attributed to fine grain strengthening, microcrack toughening, crack deflection and crack microbridging. In summary, a reasonable mixture of ultrafine TiCN and micron TiCN powders was beneficial to improve the comprehensive properties of TiCN-based cermets.
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Keywords
Ultrafine TiCN powders, cermets, microstructure, mechanical properties
References
1 Lengauer, W., Scagnetto, F.: Ti (C,N)-based cermets: critical review of achievements and recent developments, Solid State Phenom., 274, 53 – 100, (2018).
2 Ettmayer, P., Kolaska, H., Lengauer, W., Dreyer, K.: Ti(C,N) cermets – metallurgy and properties, Int. J. Refract. Met. H., 13, 343 – 351, (1995).
3 Xu, X., Zheng, Y., Zhang, G., Ke, Z., Wu, H., Yang, Z., Zhou, W.: Microstructure and mechanical properties of Ti(C,N)-based cermets fabricated using Ni-coated mixed powders, Ceram. Int., 46, 16944 – 16948, (2020).
4 Zhou, W., Zheng, Y., Zhao, Y., Zhang, G., Ke, Z., Yu, L.: Study on microstructure and properties of Ti(C,N)-based cermets with dual grain structure, Ceram. Int., 44, 14487 – 14494, (2018).
5 Lin, N., Zheng, Z., Zhao, L., Ma, C., Wang, Z., He, Y.: Influences of ultrafine Ti(C,N) additions on microstructure and properties of micro Ti(C,N)-based cermets, Mater. Chem. Phys., 230, 197 – 206, (2019).
6 Liu, A.J., Liu, N.: Effect of granule size and WC content on microstructure and mechanical properties of double structure Ti(C,N) based cermets, Rare Metal Mat. Eng., 48, 375 – 384, (2019).
7 Xu, X., Zheng, Y., Zhang, G., Yang, Z., Ke, Z., Wu, H., Lu, X.: Preparation of highly toughened Ti(C,N)-based cermets via mechanical activation and subsequent in situ carbothermal reduction, Int. J. Refract. Met. H., 92, 105310, (2020).
8 Yang, H.Y., Wang, Z., Yue, X., Ji, P.J., Shu, S.L.: Simultaneously improved strength and toughness of in situ bi-phased TiB2-Ti(C,N)-ni cermets by mo addition, J. Alloy. Compd., 820, 153068, (2020).
9 Xiong, H., Xie, D., Chen, J., Chu, S., Gan, X., Li, Z., Zhou, K.: Ti(C, N)-based cermets with strengthened interfaces: roles of secondary cubic carbides, J. Am. Ceram. Soc., 103, 1582 – 1592, (2020).
10 Xiong, H., Chu, S., Lei, P., Li, Z., Zhou, K.: Ti(C,N)-based cermets containing uniformly dispersed ultrafine rimless grains: effect of VC additions on the microstructure and mechanical properties, Ceram. Int., 46, 19904 – 19911, (2020).
11 Park, S., Kang, S.: Toughened ultra-fine (Ti, W)(CN)-ni cermets, Scripta Mater., 52, 129 – 133, (2005).
12 Liu, Y., Jin, Y.Z., Yu, H.J., Ye, J.W.: Ultrafine (Ti, M) (C,N)-based cermets with optimal mechanical properties, Int. J. Refract. Met. H., 29, 104 – 107, (2011).
13 Zheng, Y., Wang, S., You, M., Tan, H., Xiong, W.: Fabrication of nanocomposite Ti(C,N)-based cermet by spark plasma sintering, Mater. Chem. Phys., 92, 64 – 70, (2005).
14 Richter, V., Ruthendorf, M.V.: On hardness and toughness of ultrafine and nanocrystalline hard materials, Int. J. Refract. Met. H., 17, 141 – 152, (1999).
15 Matsuda, T.: Effect of C/TiO2 ratio in raw materials on thermal conductivity of titanium carbonitrides synthesized by carbothermal reduction, J. Alloy. Compd., 816, 152541, (2020).
16 Zhang, G., Zheng, Y., Zhou, W., Ke, Z., Ding, W., Yu, L., Yan, Y.: Microstructure evolution and characteristic of Ti(C,N)-based cermets prepared by in situ carbothermal reduction in TiO2, J. Am. Ceram. Soc., 102, 3009 – 3018, (2019).
17 Zhang, G., Zheng, Y., Zhou, W., Zhao, Y., Zhang, J., Ke, Z., Yu, L.: Microstructure and mechanical properties of Ti(C,N)-based cermets fabricated by in situ carbothermal reduction of TiO2 and subsequent liquid phase sintering, Ceram. Int., 44, 3092 – 3098, (2018).
18 Zhou, W., Zheng, Y., Zhao, Y., Zhang, G., Zhang, J.: Densification behavior, microstructure evolution and mechanical properties of Ti(C,N)-based cermets fabricated by in situ carbothermal reduction of WO3 and subsequent liquid sintering, Int. J. Refract. Met. H., 74, 70 – 77, (2018).
19 Schubert, W.D., Neumeister, H., Kinger, G., Lux, B.: Hardness to toughness relationship of fine-grained WC-co hard metals, Int. J. Refract. Met. H., 16, 133 – 142, (1998).
20 Wan, W., Xiong, J., Liang, M.: Effects of secondary carbides on the microstructure, mechanical properties and erosive wear of Ti(C,N)-based cermets, Ceram. Int., 43, 944 – 952, (2017).
21 Zhang, H., Fu, M., Ma, L., Gu, S., Liu, J., Chen, Y.: Fabrication and properties of (Ti, W, mo, nb, Ta) (C,N)-Co-ni cermets, J. Mater. Eng. Perform., 28, 7198 – 7205, (2019).
22 Wang, J., Liu, Y., Ye, J., Ma, S., Pang, J.: The fabrication of multi-core structure cermets based on (Ti, W, Ta)CN and TiCN solid-solution powders, Int. J. Refract. Met. H., 64, 294 – 300, (2017).
23 Jin, Y., Liu, Y., Wang, Y., Ye, J.: Study on phase evolution during reaction synthesis of ultrafine (Ti, W, mo, V)(C, N)-ni composite powders, Mater. Chem. Phys., 118, 191 – 196, (2009).
24 Li, P., Ye, J., Liu, Y., Yang, D., Yu, H.: Study on the formation of core-rim structure in Ti(CN)-based cermets, Int. J. Refract. Met. H., 35, 27 – 31, (2012).
25 Zhang, M., Yao, H., Wang, H., Chen, Q., Bai, X., Zhao, X., Fang, Y., Xu, H., Li, Q.: In situ Ti(C,N)-based cermets by reactive hot pressing: reaction process, densification behavior and mechanical properties, Ceram. Int., 45, 1363 – 1369, (2019).
26 Xiong, H., Wu, Y., Li, Z., Gan, X., Zhou, K., Chai, L.: Comparison of Ti(C,N)-based cermets by vacuum and gas-pressure sintering: microstructure and mechanical properties, Ceram. Int., 44, 805 – 813, (2018).
27 Liu, N., Chao, S., Huang, X.: Effects of TiC/TiN addition on the microstructure and mechanical properties of ultra-fine grade Ti(C,N)-ni cermets, J. Eur. Ceram. Soc., 26, 3861 – 3870, (2006).
28 Marqusee, J.A., Ross, J.: Theory of ostwald ripening: competitive growth and its dependence on volume fraction, J. Chem. Phys., 80, 536 – 543, (1984).
29 Mannesson, K., Jeppsson, J., Borgenstam, A., Ågren, J.: Carbide grain growth in cemented carbides, Acta Mater., 59, 1912 – 1923, (2011).
30 Hansen, N.: Hall-petch relation and boundary strengthening, Scripta Mater., 51, 801 – 806, (2004).
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