Preparation of ultrafine WC-Co cermets by combining pretreatment and consolidation with spark plasma sintering

稀有金属（英文版）, 2009, 28(4): 391-395. doi: 10.1007/s12598-009-0077-4

^1, , ^2, , ^3, , ^4, , ^5,

1.Key Laboratory of Chinese Ministry of Education for Advanced Functional Materials, School of Materials Science and Engineering, Beijing University of Technology, Beijing I00022, China

2.Key Laboratory of Chinese Ministry of Education for Advanced Functional Materials, School of Materials Science and Engineering, Beijing University of Technology, Beijing I00022, China

3.Key Laboratory of Chinese Ministry of Education for Advanced Functional Materials, School of Materials Science and Engineering, Beijing University of Technology, Beijing I00022, China

4.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100080, China

5.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100080, China

基金项目: 国家自然科学基金(50401001;50671001) the Program for New Century Excellent Talents in Universities of China(NCET-06-0182)

Preparation of ultrafine WC-Co cermets by combining pretreatment and consolidation with spark plasma sintering

ZHAO Shixian ^1, , SONG Xiaoyan ^2, , WANG Mingsheng ^3, , LIU Guoquan ^4, , ZHANG Jiuxing ^5,

1.Key Laboratory of Chinese Ministry of Education for Advanced Functional Materials, School of Materials Science and Engineering, Beijing University of Technology, Beijing I00022, China

2.Key Laboratory of Chinese Ministry of Education for Advanced Functional Materials, School of Materials Science and Engineering, Beijing University of Technology, Beijing I00022, China

3.Key Laboratory of Chinese Ministry of Education for Advanced Functional Materials, School of Materials Science and Engineering, Beijing University of Technology, Beijing I00022, China

4.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100080, China

5.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100080, China

Keywords： cermets

Ultrafine-grained WC-Co bulk materials were prepared by a new method that contains pretreatrnent of the milled powder mixture and sub-sequent spark plasma sintering (SPS). Ball milling parameters and the pretreatment temperature have significant effects on the microstructure and properties of WC-Co cermets. The prepared cermets have a mean grain size of less than 0.5 μm even with a pretreatment temperature as high as 1300℃. The WC-10wt.%Co cermet bulk prepared by the optimized milling, pretreatment, and SPS processing achieves excellent mechanical properties with a Vickers hardness of HV 1643, a fracture toughness of 13.1 MPa-m1/2and a transverse rapture strength of 3100 MPa.

参考文献

[1]	El-Eskandarany M S;Mahday A A;Ahmed H A;Amer A.H .Synthesis and characterization of ball-milled nanocrystalline WC and nanocomposite WC-Co powders and subsequent consolidations[J].Journal of Alloys and Compounds,2000,312:315.
[2]	Parasiris A.;Hartwig K.T. .Consolidation of advanced WC-Co powders[J].International Journal of Refractory Metals & Hard Materials,2000(1):23-31.
[3]	Sanchez J M;Ordonez A;arid Gonzalez R .HIP after sintering of ultrafine WC-Co hardmetals[J].International Journal of Refractory Metals and Hard Materials,2005,23:193.
[4]	Kim H C;Oh D Y;Shon I J .Sintering of nanophase WC-15vol.%Co hardmetals by rapid sintering process[J].International Journal of Refractory Metals and Hard Materials,2004,22:197.
[5]	Shi X L;Shao G Q;Duan X L;Xiong Z,Yang H .Characterizations of WC-10Co nanocomposite powders and subsequently sinterhip sintered cemented carbide[J].Materials Characterization,2006,57:358.
[6]	Breval E;Cheng JP;Agrawal DK;Gigl P;Dennis A;Roy R;Papworth AJ .Comparison between microwave and conventional sintering of WC/Co composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):285-295.
[7]	Michalski A;Siemiaszko D .Nanocrystalline cemented carbides sintered by the pulse plasma method[J].International Journal of Refractory Metals and Hard Materials,2007,25:153.
[8]	Huang S G;Li L;Vanmeensel K;Vander Biest O,Vleugels J .VC,Cr3C2 and NbC doped WC-Co cemented carbides prepared by pulsed electric current sintering[J].International Journal of Refractory Metals and Hard Materials,2007,25:417.
[9]	Huang B;Chen L D;Bai S Q .Bulk ultrafine binderless WC prepared by spark plasma sintering[J].Scripta Materialia,2006,54:441.
[10]	Kangwantrakool S;Shinohara K .Sintering behavior of mechanically coated WC-Co/TiC-Al2O3 particles by high-speed rotational impact blending[J].International Journal of Refractory Metals and Hard Materials,2003,21:171.
[11]	Zhang F M;Shen J;Sun J F .The effect of phosphorus addition on densification,grain growth and properties of nanocrystalline WC-Co composites[J].Journal of Alloys and Compounds,2004,385:96.
[12]	Cha SI.;Hong SH.;Kim BK. .Spark plasma sintering behavior of nanocrystalline WC-10Co cemented carbide powders[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):31-38.
[13]	Sivaprahasam D;Chandrasekar S B;Sundaresan R .Microstmcture and mechanical properties of nanocrystalline WC-12Co consolidated by spark plasma sintering[J].International Journal of Refractory Metals and Hard Materials,2007,25:144.
[14]	Jia C C;Tang H;Mei X Z;Yin F.Z,Qu X.H .Spark plasma sintering on nanometer scale WC-Co powder[J].Mater Len,2005,59:2566.
[15]	Zhao S X;Song X Y;Zhang J X;Liu X.M .Effects of scale combination and condition of raw powders on SPS sintered near-nanocrystalline WC-Co alloy[J].Materials Science and Engineering,2008,473(04):323.
[16]	Shi XL;Shao GQ;Duan XL;Yuan RZ;Lin HH .Mechanical properties, phases and microstructure of ultrafine hardmetals prepared by WC-6.29Co nanocrystalline composite powder[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):335-339.

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