Grain growth behaviour and mechanical properties of coarse-grained cemented carbides with bimodal grain size distributions
Grain growth behaviour and mechanical properties of coarse-grained cemented carbides with bimodal grain size distributions
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双峰晶粒尺寸分布粗晶硬质合金的晶粒长大行为和力学性能
DOI：
10.1016/j.msea.2020.140586
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发表时间：
2020-11
期刊：
影响因子：
6.4
通讯作者：
Ruan Jianming
中科院分区：
文献类型：
--
作者：
He Rengui;Yang Qiumin;Li Bin;Lou Jia;Yang Hailin;Ruan Jianming
采用精确控制WC粒度分布的WC-5Co复合粉末，研究了具有双晶粒度分布的粗晶硬质合金的WC晶粒长大行为和力学性能。采用Sol-Gel法制备了复合粉末，并在粗WC(C-WC，6.0gμm)中加入超细WC(UF-WC，300 nm)以调节WC的粒度分布。结果表明，当UF-WC加入量较低(≤6%)时，WC颗粒呈二维形核长大，呈截断的三棱柱状；而当UF-WC加入量较高(≥9%)时，WC颗粒以三维形核长大，呈金字塔状，具有层层结构。维氏硬度和断裂韧性测试表明，含6wt%UF-WC的硬质合金硬度(1281.7±11.6)HV_(10)和断裂韧性(25.4±0.2)Mpa·M~(1/2)均有显著提高。
The WC grain growth behaviour and mechanical properties of coarse-grained cemented carbides with bimodal grain size distributions were investigated using WC-5Co composite powders with accurately controlled WC grain size distribution. The composite powders were prepared by a Sol-Gel process and ultrafine WC (UF-WC, 300 nm) was added to coarse WC (C-WC, 6.0 μm) to adjust the WC grain size distribution. It indicated that the WC grains undergo 2-D nucleation with 2-D growth at low UF-WC addition (≤6 wt%), resulting in a truncated trigonal prisms shape, whereas the WC grains grow up through 2-D nucleation with 3-D growth at high UF-WC addition (≥9 wt%), leading to a pyramid-like shape with a layer-by-layer structure of WC grains. Vickers hardness and fracture toughness tests indicated that the cemented carbide containing 6 wt% UF-WC present significant improvements in the hardness (1281.7 ± 1.6 HV10) and the fracture toughness (25.4 ± 0.2 MPa m1/2).
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影响因子：
5.2
作者：
R. He;Jianying Wang;Meng He;Hailin Yang;J. Ruan
通讯作者：
R. He;Jianying Wang;Meng He;Hailin Yang;J. Ruan
影响因子：
4.5
作者：
L. Froschauer;R. Fulrath
通讯作者：
L. Froschauer;R. Fulrath
影响因子：
8.6
作者：
R. Kunkel;B. Poelsema;L. K. Verheij;G. Comşa
通讯作者：
R. Kunkel;B. Poelsema;L. K. Verheij;G. Comşa
影响因子：
5.7
作者：
Muyung-Koo Kang;Doh-Yeon Kim;N. Hwang
通讯作者：
Muyung-Koo Kang;Doh-Yeon Kim;N. Hwang
DOI：
10.1098/rsta.1951.0006
发表时间：
1951-01-01
影响因子：
--
作者：
BURTON, WK;CABRERA, N;FRANK, FC
通讯作者：
FRANK, FC