Mechanical properties of WC–10Co cemented carbides sintered from nanocrystalline spray conversion processed powders

Seung, I.; Hong, Soon Hyung; Ha, Gook Hyun; Kim, Byung K

doi:10.1016/s0263-4368(01)00057-9

Cited by 83 publications

(23 citation statements)

References 9 publications

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“…It was confirmed that more infiltrated aluminum was available to provide a higher toughness to the composite. The enhanced toughness would be attributed to the shielding effect on the crack tip and the crack bridging action caused by the ductile aluminum addition reported elsewhere [23][24][25][26]. However, the fracture toughness of the composite with 40 wt.% TiB 2 decreased slightly.…”

Section: Methodsmentioning

confidence: 67%

Microstructure and mechanical properties of B4C-TiB2-Al composites fabricated by vacuum infiltration

Lü

Yue

et al. 2010

Rare Metals

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B 4 C-TiB 2 -Al composites were fabricated by infiltrating aluminum into porous B 4 C-TiB 2 preforms in vacuum. The microstucture and mechanical properties of the B 4 C-TiB 2 -Al composites were investigated. The hardness decreased, the flexural strength increased, and the fracture toughness first increased and then decreased slightly with an increase in TiB 2 content. The B 4 C-TiB 2 -Al composite with 40wt.% TiB 2 showed the optimized properties. The infiltrated aluminum addition was the leading reason for the fracture toughness improvement of the composites. The tear ridges and dimples on the fracture surface of the composites increased gradually with the increase of infiltrated aluminum content showing inter/transgranular fracture mode. The relationships between the microstructures and the mechanical properties of the composites were discussed.

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Section: Methodsmentioning

confidence: 67%

Microstructure and mechanical properties of B4C-TiB2-Al composites fabricated by vacuum infiltration

Lü

Yue

et al. 2010

Rare Metals

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“…Therefore, only in this case, the mlicc d WC is proportional to l according to the stereological relation (22) and the LG model (46) can be reduced to the single dependence on the mlibp l similar to the hardness dependence on d WC in the LG model for the fixed volume fraction V V (Cha, Hong, Ha, & Kim, 2001;Jeong, Kim, Doh, et al, 2007;Kim, Massa, & Rohrer, 2007;Lee, Cha, Kim, & Hong, 2006;Milman, Chugunova, Goncharuck, Luyckx, & Northrop, 1997;Milman, Luyckx, & Northrop, 1999;Roebuck, 1995;. As soon as the volume fraction V V changes, a more complex dependence of the yield stress s y on all the microstructure parameters should be used instead as it is shown in the LG model for the hardness (46) (Gurland, 1979;Lee & Gurland, 1978).…”

Section: Armstrong and Cazacu (Ac) Model Based On Strength To Yield Smentioning

confidence: 99%

Fracture and Strength of Hardmetals at Room Temperature

Shatov¹,

Ponomarev

Фирстов

2014

Comprehensive Hard Materials

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“…Hence, Cr 3 C 2 and V 8 C 7 only influenced the properties of the WC/WC grain boundaries, and the resulting growth inhibition of WC grains ultimately induced an increase in hardness. Cha et al 28) reported that the hardness of WC-10 mass% Co cemented carbides, with and without small amounts of various GGIs, changed as a function of the WC grain size according to a Hall-Petch-type relationship. In contrast, Cr 3 C 2 additions to WC-10 mass% Co cemented carbide have been reported to yield harder ceramics than V 8 C 7 additions for equal WC grain sizes.…”

Section: Ceramics Generally Exhibit Linear Hardness-(grain Size)mentioning

confidence: 99%

Effects of Cr3C2 and V8C7 on the Microstructure and Mechanical Properties of WC-SiC Whisker Ceramics

2009

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WC-SiC whisker ceramics (5 vol% SiC) containing Cr 3 C 2 and/or V 8 C 7 with no metallic binders were prepared by resistance-heated hot pressing at 1650 C and were examined with regard to sinterability, microstructure and mechanical properties. The addition of Cr 3 C 2 or V 8 C 7 brought about an increase or decrease in the sinterability. For equal molar amounts of Cr and V, V 8 C 7 more strongly inhibited the growth of WC grains than Cr 3 C 2 . The hardness of the ceramics was dependent on the WC grain size which was influenced by the nature or quantity of the additives. The hardness values are consistent with the Hall-Petch-type relationship between hardness and WC grain size estimated for WC phases in WC-Co cemented carbides.

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Mechanical properties of WC–10Co cemented carbides sintered from nanocrystalline spray conversion processed powders

Cited by 83 publications

References 9 publications

Microstructure and mechanical properties of B4C-TiB2-Al composites fabricated by vacuum infiltration

Microstructure and mechanical properties of B4C-TiB2-Al composites fabricated by vacuum infiltration

Fracture and Strength of Hardmetals at Room Temperature

Effects of Cr<SUB>3</SUB>C<SUB>2</SUB> and V<SUB>8</SUB>C<SUB>7</SUB> on the Microstructure and Mechanical Properties of WC-SiC Whisker Ceramics

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