Microstructure and Mechanical Properties of Nano-Scale Al2O3 Toughened Ti (C,N) Matrix Cermet Tool Materials

Huang, Chuan Zhen; Wang, Jun; Xu, Li Qiang; Wang, Sui Lian; Liu, Han Lian

doi:10.4028/www.scientific.net/MSF.532-533.37

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Microstructure and Mechanical Properties of Nano-Scale Al₂O₃ Toughened Ti (C,N) Matrix Cermet Tool Materials

Abstract:

Advanced Ti(C, N) matrix cermet tool materials with higher mechanical properties are successfully developed by dispersing nano-scale Al2O3 powder into the micro-scale Ti(C, N) matrix and Ni-Mo bonding phases powder. The effect of the content of nano-scale alumina on the microstructure and mechanical properties of micro-scale Ti(C, N) matrix cermet tool materials are investigated. The research results show that a type of Ti(C, N) matrix cermet tool material has the most optimal flexural strength of 900MPa, Vickers hardness of 17.4GPa and fracture toughness of 9.95MPa.m1/2 when the content of nano-scale alumina is 12% in term of mass. It is found from the microstructure analysis that the main reason of the mechanical properties improvement is the grain fining effect caused by nano-scale Al2O3.

Info:

Periodical:

Materials Science Forum (Volumes 532-533)

Main Theme:

Advances in Materials Manufacturing Science and Technology II

Edited by:

Chengyu Jiang, Geng Liu, Dinghua Zhang and Xipeng Xu

Pages:

37-40

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.532-533.37

Citation:

C. Z. Huang et al., "Microstructure and Mechanical Properties of Nano-Scale Al₂O₃ Toughened Ti (C,N) Matrix Cermet Tool Materials ", Materials Science Forum, Vols. 532-533, pp. 37-40, 2006

Online since:

December 2006

Authors:

Chuan Zhen Huang, Jun Wang, Li Qiang Xu, Sui Lian Wang, Han Lian Liu

Keywords:

Ceramic Tool Material, Mechanical Property, Microstructure, Ti (C,N) Matrix Cermet

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$38.00

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References

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Paper TitlePages

A Study on the Microstructure of Ti(C,N) Matrix Cermet Tool Material

Authors: Chuan Zhen Huang, Lin He, Jun Wang, Han Lian Liu

The Effect of the Content of Carbide on the Mechanical Properties of Ti(C,N) Based Cermet

Authors: Chuan Zhen Huang, Lin He, Han Lian Liu, Sui Lian Wang

A Study on the Mechanical Properties of Ti(C, N) Based Ceramic Tool Material

Authors: Sui Lian Wang, Li Qiang Xu, Chuan Zhen Huang, Han Lian Liu

Abstract: Ti(C, N) based ceramic tool materials in the Ti (C0.7N0.3)-(Ni-Co)-Cr3C2-VC system have been made by hot-pressing technology, their mechanical properties and fracture morphologies have been studied under three different fabrication conditions. The results show that the mechanical properties are significantly influenced by fabrication conditions, and the main fracture mode is intergranular fracture.

369

Microstructures and Mechanical Properties of Nano-Composite Ti(C,N)-Based Cermets

Authors: Wen Jun Liu, Yong Zheng, Wei Hao Xiong

Abstract: Several nano-composite Ti(C, N)-based cermets were produced by vacuum sintering and subsequently heat-treated with hot isostatic pressing (HIP) in Ar. The influence of nano powder additions on the microstructures and properties of cermets has been studied It was found that, with increasing nano powder additions, the microstructures became finer and even, the amount of small grains with inner-rim, outer-rim and those with “white core-gray rim” increased. When nano TiC and TiN additions accounted for 20wt% of the amount of TiC and TiN, the samples exhibited the best properties. Some nano particles were found to distribute at (along?) the grain boundaries of cermets, which strengthened the grain boundaries and improved the mechanical properties of Ti(C, N)-based cermets.

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Effects of Nano-ZrO₂ on the Microstructure and Mechanical Properties of Ti(C,N)-Based Cermet Die Materials

Authors: Xing Hai Wang, Chong Hai Xu, Ming Dong Yi, Hui Fa Zhang

Abstract: In recent, the development of new die materials is one of the important topics in the field of die research. In this paper, effects of nano-ZrO2 addition on the microstructure and mechanical properties of Ti(C,N)-based cermets were studied. The newly developed Ti(C,N)-based cermet die materials with different contents of nano-ZrO2 of 0~25wt% were prepared by hot pressing technique under vacuum atmosphere at 1450°C for 30min. Moreover, the microstructure of this Ti(C,N)-based cermet die materials was observed by environmental scanning electron microscope. It indicates that the comprehensive mechanical properties can reach the optimum when the weight percent of the nano-ZrO2 is 10%. The corresponding flexural strength and fracture toughness is 967 MPa and 13.62 MPa•m1/2, respectively which is approximately 65% and 110% higher than that of the cermet without nano-ZrO2 addition. It suggests that the addition of nano-ZrO2 can improve the mechanical properties especially the fracture toughness and flexural strength of Ti(C,N)-based cermet die materials.

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