A Method for Quantification of Discontinuous Grain Growth and its Application to Cemented Carbides

1983 ◽  
pp. 263-279 ◽  
Author(s):  
K. M. Friederich ◽  
H. E. Exner
Keyword(s):  
Grain Growth ◽  
Cemented Carbides

Effect of Binder Composition on WC Grain Growth in Cemented Carbides

2015 ◽  
Vol 98 (11) ◽  
pp. 3596-3601 ◽  
Author(s):  
Maxime Pellan ◽  
Sabine Lay ◽  
Jean-Michel Missiaen ◽  
Susanne Norgren ◽  
Jenny Angseryd ◽  
...  
Keyword(s):  
Grain Growth ◽  
Cemented Carbides ◽  
Binder Composition

Liquid Phase Sintering of (Ti,W)C-Ni-Co-Cr Cermets: Microstructure and Abrasive Wear Behavior

2018 ◽  
Vol 274 ◽  
pp. 1-8 ◽  
Author(s):  
I. Iparraguirre ◽  
L. Lozada ◽  
F. Ibarreta ◽  
R. Martinez ◽  
J.M. Sanchez
Keyword(s):  
Liquid Phase ◽  
Grain Growth ◽  
Abrasion Resistance ◽  
Wear Behavior ◽  
Liquid Phase Sintering ◽  
Point Of View ◽  
Cemented Carbides ◽  
Microstructural Refinement ◽  
Abrasive Wear Behavior ◽  
High Degree

TiC-WC-(Ni,Co,Cr) cermets are potential candidates for the substitution of straight cemented carbides in certain wear applications. This work analyses the effect of Ti/W and Co/Ni ratios on the microstructure and abrasion resistance of this type of cermets. From a microstructural point of view, cermets in the (Ti,W)C-(Ni,Co,Cr) pseudo-binary region show uncontrolled (Ti,W)C grain growth and a high degree of contiguity of the carbide phase. A microstructural refinement is observed as the Ti/W ratio decreases, especially when WC precipitation occurs. Abrasion resistance in these materials is dominated by hardness.

scholarly journals Study on Microstructure and Mechanical Properties of WC-10Ni3Al Cemented Carbide Prepared by Different Ball-Milling Suspension

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2224 ◽  
Author(s):  
Minai Zhang ◽  
Zhun Cheng ◽  
Jingmao Li ◽  
Shengguan Qu ◽  
Xiaoqiang Li
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Ball Milling ◽  
Grain Growth ◽  
Organic Solvents ◽  
Crack Deflection ◽  
Cemented Carbides ◽  
Powder Metallurgy Method ◽  
Microstructure And Mechanical Properties ◽  
Α Al2o3

In this paper, WC-10Ni3Al cemented carbides were prepared by the powder metallurgy method, and the effects of ball-milling powders with two different organic solvents on the microstructure and mechanical properties of cemented carbides were studied. We show that the oxygen in the organic solvent can be absorbed into the mixed powders by ball-milling when ethanol (CH3CH2OH) is used as a ball-milling suspension. This oxygen leads to the formation of α-Al2O3 during sintering, which improves the fracture toughness, due to crack deflection and bridging, while the formation of η-phase (Ni3W3C) inhibits the grain growth and increases the hardness. Alternatively, samples milled using cyclohexane (C6H12) showed grain growth during processing, which led to a decrease in hardness. Therefore, the increase of oxygen content from using organic solvents during milling improves the properties of WC-Ni3Al composites. The growth of WC grains can be inhibited and the hardness can be improved without loss of toughness by self-generating α-Al2O3 and η-phase (Ni3W3C).

scholarly journals Solid-solubilities of grain-growth inhibitors in WC-Ni-based cemented carbides: experimental investigations and thermodynamic calculations

2020 ◽  
Vol 9 (5) ◽  
pp. 10346-10354
Author(s):  
Yingbiao Peng ◽  
Gongzhi Huang ◽  
Shuyan Zhang ◽  
Mingqiang Chu ◽  
Yong Du ◽  
...  
Keyword(s):  
Grain Growth ◽  
Thermodynamic Calculations ◽  
Cemented Carbides ◽  
Experimental Investigations ◽  
Growth Inhibitors

scholarly journals Electrochemical Corrosion Resistance of Ni and Co Bonded Near-Nano and Nanostructured Cemented Carbides

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 224 ◽  
Author(s):  
Tamara Aleksandrov Fabijanić ◽  
Marin Kurtela ◽  
Irbas Škrinjarić ◽  
Johannes Pötschke ◽  
Markus Mayer
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Grain Growth ◽  
Electrochemical Impedance ◽  
Electrochemical Corrosion ◽  
Common Interest ◽  
Cemented Carbides ◽  
Wear Resistant ◽  
Two Samples ◽  
Electrochemical Corrosion Resistance

The advantages of nanostructured cemented carbides are a uniform, homogenous microstructure and superior, high uniform mechanical properties, which makes them the best choice for wear-resistant applications. Wear-resistant applications in the chemical and petroleum industry, besides mechanical properties, require corrosion resistance of the parts. Co as a binder is not an optimal solution due to selective dissolution in an acidic environment. Thus, the development of cemented carbides with alternative binders to increase the corrosion resistance but still retaining mechanical properties is of common interest. Starting mixtures with WC powder, grain growth inhibitors GGIs; VC and Cr3C2, and an identical binder amount of 11-wt.% were prepared. GGIs were added to retain the size of the starting WC powder in the sintered samples. The parameters of the powder metallurgy process were adapted, and samples have been successfully consolidated. A very fine homogeneous microstructure with relatively uniform grain-size distribution and without microstructural defects in the form of carbide agglomerates and abnormal grain growth was achieved for both Ni-bonded and Co-bonded samples. Achieved mechanical properties, Vickers hardness, and Palmqvist toughness, of Ni-bonded near-nanostructured cemented carbides are slightly lower but still comparable to Co-bonded nanostructured cemented carbides. Two samples of each grade were researched by different electrochemical direct current corrosion techniques. The open circuit potential Ecorr, the linear polarisation resistance (LPR), the Tafel extrapolation method, and the electrochemical impedance spectroscopy (EIS) at room temperature in the solution of 3.5% NaCl. From the carried research, it was found that chemical composition of the binder significantly influenced the electrochemical corrosion resistance. Better corrosion resistance was observed for Ni-bonded samples compared to Co-bonded samples. The corrosion rate of Ni-bonded cemented carbides is approximately four times lower compared to Co-bonded cemented carbides.

Carbide grain growth in cemented carbides

2011 ◽  
Vol 59 (5) ◽  
pp. 1912-1923 ◽  
Author(s):  
Karin Mannesson ◽  
Johan Jeppsson ◽  
Annika Borgenstam ◽  
John Ågren
Keyword(s):  
Grain Growth ◽  
Cemented Carbides

Impact of crystal defects on the grain growth of cemented carbides

2018 ◽  
Vol 72 ◽  
pp. 199-202 ◽  
Author(s):  
J. Weidow ◽  
E. Ekström ◽  
M. Kritikos ◽  
S. Norgren
Keyword(s):  
Grain Growth ◽  
Crystal Defects ◽  
Cemented Carbides

Computational study on grain growth in cemented carbides

2002 ◽  
Vol 20 (1) ◽  
pp. 31-40 ◽  
Author(s):  
J. Kishino ◽  
H. Nomura ◽  
S.-G. Shin ◽  
H. Matsubara ◽  
T. Tanase
Keyword(s):  
Grain Growth ◽  
Computational Study ◽  
Cemented Carbides
Sign in / Sign up

Export Citation Format

Share Document