Effect of TiO2 addition on the densification behavior, microstructure and mechanical properties of Al2O3-Cr cermets prepared via vacuum sintering

Vacuum ◽  
2017 ◽  
Vol 146 ◽  
pp. 274-277 ◽  
Author(s):  
Yijie Zhao ◽  
Yong Zheng ◽  
Weimin Ding ◽  
Wei Zhou ◽  
Guotao Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Densification Behavior ◽  
Vacuum Sintering ◽  
Microstructure And Mechanical Properties ◽  
Tio2 Addition

Effect of Cold Isostatic Pressing on the Mechanical Properties of WC-8Co Cemented Carbide for Friction Stir Welding Tool

2014 ◽  
Vol 563 ◽  
pp. 107-111
Author(s):  
Chen Zhang ◽  
Bing Liang Liang ◽  
Yun Long Ai ◽  
Chang Hong Liu
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Relative Density ◽  
Cold Isostatic Pressing ◽  
Cemented Carbide ◽  
Vacuum Sintering ◽  
Pressing Method ◽  
Isostatic Pressing ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties

WC-8Co cemented carbide specimens were prepared via vacuum sintering. The effects of cold isostatic pressing (CIP) on microstructure and mechanical properties were investigated. The results show that only WC and Co3W3C (γ-phase) were detected by XRD without any else phases, even though Co. Dense WC-8Co cemented carbide samples were obtained and relative density reached over 98%. The pressing method, instead of pressure, took an important role in the mechanical properties of WC-8Co cemented carbide. KIC and TRS of WC-8Co cemented carbide were improved at least 27% and 24%, respectively, by the use of CIP. WC-8Co cemented carbide with excellent mechanical properties (HRA>93.5, KIC>11MPa·m1/2, TRS>870MPa) was obtained by using CIP.

Influence of hardening additives on the characteristics of TiC‒Al2O3 ceramic composite tribological applications, obtained by SHS

2020 ◽  
pp. 47-55
Author(s):  
D. H. A. Besisa ◽  
Z. I. Zaki ◽  
A. M. M. Amin ◽  
Y. M. Z. Ahmed ◽  
E. M. M. Ewais
Keyword(s):  
Mechanical Properties ◽  
Ceramic Composite ◽  
Densification Behavior ◽  
Nickel Metal ◽  
Temperature Synthesis ◽  
Ni Content ◽  
Microstructure And Mechanical Properties ◽  
High Temperature Synthesis ◽  
Ni Addition ◽  
Different Content

In attempts to attain a SHS synthesized TiC‒Al2O3 composite with high density, homogenous microstructure and extra mechanical properties for using in aggressive media, addition of different reinforcements have to be studied and inspected. In this work, ductile nickel metal powder with different content (5‒20 wt. %) and 1 mole fraction dilution of alumina and zirconia with and without Ni addition are introduced to TiC‒Al2O3 ceramic and synthesized by combined self-propagating high temperature synthesis (SHS) and direct consolidation (DC) technique. The influence of nickel wt. % and dilution with zirconia and alumina on the phase composition, densification behavior, microstructure and mechanical properties of SHS synthesized TiC‒Al2O3 composite has been investigated and analyzed. Results revealed that, addition of 5 wt. % Ni gave the best densification behavior, microstructure and mechanical properties with exact formation of the target composite of TiC‒Al2O3. However, increasing Ni content higher than 5 wt % and dilution with zirconia and alumina led to disturbing the chemical reactions between the starting precursors, drooping and deterioration in density, microstructure and mechanical properties. Accordingly, this study suggests the addition of 5 wt. % Ni for a highly dense TiC‒Al2O3 composite with homogenized morphology and unparalleled mechanical properties. Moreover, the different investigated characteristics of the produced composites nominate it strongly to be used successfully in aggressive and tribological applications.

scholarly journals Microstructure and Mechanical Properties of Multicomponent Metal Ti(C,N)-Based Cermets

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 927
Author(s):  
Xuelei Wang ◽  
Qiufeng Wang ◽  
Zhaojun Dong ◽  
Xiaoqian Zhou ◽  
Xiaoliang Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Dispersive Spectrometry ◽  
Bending Strength ◽  
Binder Phase ◽  
X Ray Diffraction ◽  
Vacuum Sintering ◽  
X Ray ◽  
Weight Percentage ◽  
Microstructure And Mechanical Properties ◽  
Backscatter Scanning Electron Microscopy

Ti(C,N)-based cermets with multicomponent ingredients were prepared using vacuum sintering technology. The effect of molding agents, binder phase and sintering temperature on Ti(C,N)-based cermets were studied. The optimum molding performance was obtained by adding 2% polyvinyl alcohol (PVA-1788). The microstructure and mechanical properties of Ti(C,N)-based cermets were investigated. The Ti(C,N)-based cermet with a weight percentage of TiC:TiN:Ni:Co:Mo:WC:Cr3C2:C = 40:10:20:10:7:8:4:1 and sintered at 1450 °C had the optimal mechanical properties. The relative bending strength, Vickers hardness, elastic modulus and wear resistance were 2010 MPa, 15.01 GPa, 483.57 GPa and 27 mg, respectively. Additionally, X-ray diffraction (XRD), backscatter scanning electron microscopy pictures (SEM–BSE), energy dispersive spectrometry (EDS) and optical micrographs of Ti(C,N)-based cermets were characterized.

Effects of Cr content on the microstructure and mechanical properties of Mo2FeB2-based cermets prepared via vacuum sintering

Vacuum ◽  
2018 ◽  
Vol 155 ◽  
pp. 509-513 ◽  
Author(s):  
Jiajie Zhang ◽  
Yong Zheng ◽  
Wei Zhou ◽  
Guotao Zhang ◽  
Zheng Ke ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Vacuum Sintering ◽  
Cr Content ◽  
Microstructure And Mechanical Properties

scholarly journals Influence of Sintering Process on Microstructure and Mechanical Properties of Ti(C,N)-Based Cermet

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 3938
Author(s):  
Kaixun Ji ◽  
Yanxin Meng ◽  
Fuzeng Wang ◽  
Yousheng Li
Keyword(s):  
Mechanical Properties ◽  
Sintering Temperature ◽  
Holding Time ◽  
Sintering Process ◽  
X Ray Diffraction ◽  
Vacuum Sintering ◽  
Material Microstructure ◽  
Cermet Material ◽  
Hardness Tester ◽  
Microstructure And Mechanical Properties

In this study, a Ti(C,N)-based cermet material was prepared through vacuum sintering. The research also investigates how holding time and maximum sintering temperature influence the material microstructure and mechanical properties. X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) were used to analyze the composition of the cermet. The microstructure of the cermet was analyzed and examined using a scanning electron microscope (SEM). A Vickers hardness tester was used to test the mechanical properties of the materials. As indicated by testing results, the hardness of the material decreases as the temperature of sintering increases, and its fracture toughness increases gradually as holding time increases. Ti(C,N)-based cermet manifested the optimal mechanical properties when sintering was conducted under 1400 °C with 80 min of holding time. Moreover, the material microstructure is significantly affected by the sintering process. The grain size of Ti(C,N) cermets increases as the sintering temperature increases. The microstructure tends to be uniform and the complete core-rim structures are established as the holding time increases.

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