Microstructure and material properties of PECS manufactured WC-NbC-CO and WC-TiC-Ni cemented carbides

Effects of TiC Content on the Microstructure and Mechanical Property of WC-TiC-TaC Cemented Carbides

“…Therefore, the hardness of the WC-TiC-TaC cemented carbides increased with the increase of TiC content. The value of the highest Vickers hardness was 19.81 GPa, which was higher than 18.53 GPa reported by the literature [33] and was close to 19.55 GPa reported by the investigation [16] .…”

“…6, the fracture toughness decreased from (14.42± 0.18) MPa•m 1/2 to (8.32±0.26) MPa•m 1/2 when the TiC content was increased from 10wt% to 25wt%. The value of the highest fracture toughness was 14.60 MPa•m 1/2 , which was higher than 12.02 MPa•m 1/2 reported by the literature [16] . In general, the fine grains were propitious to enhance the fracture toughness while the coarse grains were adverse to the improvement of the fracture toughness.…”

“…Tungsten carbide (WC) has high hardness, high elastic modulus and good wettability by molten metals [1][2][3] . However, the Vickers hardness of WC (16)(17)(18)(19)(20)(21)(22) is lower than that of other carbides such as TiC (28)(29)(30)(31)(32)(33)(34)(35), ZrC (25.9 GPa) and HfC (26.1 GPa) [4][5] . In order to improve mechanical properties, physical and chemical properties of WC such as flexural strength, fracture toughness, hardness, high temperature plastic deformation resistance, high temperature oxidation resistance and wear resistance, other carbide powders and metal powders were mixed with WC powder to produce WC-based cemented carbides.…”

“…Mo 2 C could refine the microstructure and improve the wettability between WC and Ni, which was advantageous to the enhancement of hardness and fracture toughness [13][14] . NbC and TaC had been found to improve the wear resistance and fracture toughness [15][16] . Besides, TaC was a very effective grain growth inhibitor and could enhance the red hardness and high temperature plastic deformation resistance of cutting tools [14,17] .…”

Wear of PM HIP Metal Matrix Composites – Influence of Carbide Type

“…Wear-resistant materials are important in several industrial processes including manufacturing, energy production, construction and mining tools or in nuclear, aerospace and gas turbine industry [1][2][3][4][5][6]. Wear resistant metal matrix composites are composed of hard particles like carbides, borides and nitrides embedded in a ductile metal matrix of for example Co, Ni and/or Fe [2][3][4][5]. These two components serve different purposes.…”