Microstructure and mechanical properties of Mo-free Ti(C,N)-based cermets with Ni–xCr binders

Yang, Qing; Xiong, Weihao; Zhang, Man; Bin, Huang; Chen, Shan

doi:10.1016/j.jallcom.2014.11.236

Cited by 33 publications

(7 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Córdoba et al [9] found that the use of Co-Ni mixtures can enhance the metallurgical reactions between TiC and TiN during liquid-phase sintering in a short time with a synergic effect between the wettability capacity of Ni and the solubilizing capacity of Co. Yang et al [14] reported that the TRS of Mo-free Ti(C,N)-based cermets had a peak value of 2204 MPa with 20 wt.% Cr content in binders, and the hardness was improved from 85.6 HRA to 87.3 HRA with the increased Cr content. Chicardi et al [15] found that the addition of graphite to the (Ti,Ta)(C,N)-Co cermets caused a significant improvement in the toughness to 10.7 ± 0.6 MPa m 1/2 with a hardness of 12.0 ± 0.5 GPa, due to the formation of ductile phases, Ti x Ta 1Àx Co 3 and a-Co. Naidoo et al [16] found that the addition of Tantalum to Ti(C,N) cermets can result in grain refinement and increases of hardness (from 16.1 GPa to 17.8 GPa) and fracture toughness (from 5.5 MPa m 1/2 to 6.9 MPa m 1/2 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of metal binder on the microstructure and mechanical properties of Ti(C,N)-based cermets

Zhao

et al. 2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Effects of metal binder on the microstructure and mechanical properties of Ti(C,N)-based cermets

Zhao

et al. 2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…From the above equation, the finer particle size after ball mill can increase the solubility of solid TiB 2 in the liquid HEA at elevated temperatures. The increased solubility decreases the melting point of HEA . This explains the appearance of a melting peak at 1260°C as indicated in Figure (blue curve).…”

Section: Resultsmentioning

confidence: 85%

Processing and characterization of TiB₂‐TiNiFeCrCoAl high‐entropy alloy composite

Koç

2017

J Am Ceram Soc

View full text Add to dashboard Cite

A series of TiB 2 -TiNiFeCrCoAl high-entropy alloy (HEA) composites with HEA contents of 5, 10, and 20 wt.% were fabricated to a relative density of above 95% without applied external pressure at 1550°C in flowing argon. Research indicates (i) the formation of liquid HEA is promoted with the assistance of an optimized ball mill process, which facilitates the sintering through a liquid phase sintering mechanism, and (ii) HEA can react with the oxide impurities in TiB 2 and can consequently enhance the densification. Continual observations on microstructures and properties indicate that the sintered composites have a submicronmeter grain size of 0.90AE0.11, 0.79AE0.09, and 0.74AE0.07 lm; a high hardness of 23.3AE0.9, 21.6AE1.0, and 17.5AE1.2 GPa; and a high indentation fracture toughness of 8.7AE0.4, 11.1AE0.6, and 12.8AE0.6 MPaÁm 1/2 , respectively, for samples with 5, 10, and 20 wt.% HEA. The addition of HEA to TiB 2 can significantly enhance the densification, results in fine microstructures, and improve the mechanical performance. K E Y W O R D Shigh-entropy alloy, mechanical properties, microstructure, sintering, titanium diboride

show abstract

“…before the liquid-phase sintering stage (in which the binder phases Ni and Co melted), specific dwell times of 30 min at 800 °C and 60 min at 1220 °C were implemented. These conditions were chosen to promote the densification of the sample [ 28 , 29 ].…”

Section: Methodsmentioning

confidence: 99%

Effect of Mo2C Addition on the Tribological Behavior of Ti(C,N)-Based Cermets

Qiu

Pan

et al. 2023

Materials

View full text Add to dashboard Cite

Due to the excellent properties of Ti (C,N)-based ceramics, such as high hardness, excellent wear resistance, exceptional thermal deformation resistance, and sound chemical stability, they have been widely used in cutting tools or molds. Thus, revealing their tribological behavior against hard materials is of great significance. Some studies have reported the tribological behavior of Ti(C,N)-based cermets and hard cermets, but so far, the effects of Mo2C additions on the frictional properties of Ti(C,N)-based cermets are still unclear. In this study, Ti(C,N)-10WC-1Cr3C2-5Co-10Ni-x Mo2C cermets (x = 4, 6, 8, 10 and 12 wt.%) were sintered using a vacuum hot-pressing furnace. Furthermore, the core–rim morphologies of the sintered samples were observed in SEM images. Then, the wear resistance of the cermets was studied against a Si3N4 ball at a 50 N load using the fretting wear test. Finally, the wear mechanism was characterized using a combination of SEM, EDS and XPS. The experimental results indicated that the wear mechanisms of the cermets were mainly abrasive wear, adhesive wear, and the formation of an oxide film. As the content of Mo2C increased from 4 wt.% to 12 wt.%, the friction coefficient and wear volume had a variation law of first decreasing and then decreasing, and reached minimum values at 6 wt.% and 12 wt.%, and the lowest friction coefficient and wear rate were 0.49 and 0.9 × 10−6 mm3/Nm, respectively. The 6 wt.% Mo2C greatly improved the hardness and fracture toughness of the cermet, while the 12 wt.% Mo2C promoted the formation of an oxide film and protected the friction surface. The cermet with 6 wt.% Mo2C is recommended because it has comprehensive advantages in terms of its mechanical properties, tribological properties, and cost.

show abstract

Microstructure and mechanical properties of Mo-free Ti(C,N)-based cermets with Ni–xCr binders

Cited by 33 publications

References 28 publications

Effects of metal binder on the microstructure and mechanical properties of Ti(C,N)-based cermets

Effects of metal binder on the microstructure and mechanical properties of Ti(C,N)-based cermets

Processing and characterization of TiB₂‐TiNiFeCrCoAl high‐entropy alloy composite

Effect of Mo2C Addition on the Tribological Behavior of Ti(C,N)-Based Cermets

Contact Info

Product

Resources

About

Microstructure and mechanical properties of Mo-free Ti(C,N)-based cermets with Ni–xCr binders

Cited by 33 publications

References 28 publications

Effects of metal binder on the microstructure and mechanical properties of Ti(C,N)-based cermets

Effects of metal binder on the microstructure and mechanical properties of Ti(C,N)-based cermets

Processing and characterization of TiB2‐TiNiFeCrCoAl high‐entropy alloy composite

Effect of Mo2C Addition on the Tribological Behavior of Ti(C,N)-Based Cermets

Contact Info

Product

Resources

About

Processing and characterization of TiB₂‐TiNiFeCrCoAl high‐entropy alloy composite