采用纳米碳化钒(V8C7)粉末作为晶粒抑制剂及放电等离子烧结(SPS)方式制备超细WC基硬质合金.X射线衍射结果表明:超细WC基硬质合金主要由WC和Co3C两相组成,随着温度的升高,WC的衍射峰逐渐向小角度偏移.扫描电镜结果表明:SPS和纳米V8C7粉末对超细WC基硬质合金的微观组织具有重要影响.SPS使超细WC基硬质合金在较低温度下(1200℃)实现致密化;纳米V8C7粉末可以有效抑制超细WC基硬质合金中WC的晶粒长大,1200℃时WC的晶粒尺寸约500 nm.力学性能结果表明:1200℃时超细WC基硬质合金具有较高的性能(相对密度99.5%,洛氏硬度93.2,断裂韧性12.5 MPa·m1/2).
参考文献
| [1] | S.G. Huang;L. Li;K. Vanmeensel .VC, Cr_3C_2 and NbC doped WC-Co cemented carbides prepared by pulsed electric current sintering[J].International Journal of Refractory Metals & Hard Materials,2007(5/6):417-422. |
| [2] | 黄道远,易丹青,刘会群,蔡志刚,刘瑞,李荐.硬质合金强度随温度的变化及失效机理的研究[J].材料热处理学报,2007(05):105-108. |
| [3] | Faming Zhang;Jun Shen;Jianfei Sun .The effect of phosphorus additions on densification, grain growth and properties of nanocrystalline WC-Co composites[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):96-103. |
| [4] | Rodiger K;Dreyer K;Gerdes T et al.Microwave sintering of hardmetals[J].International Journal of Refractory Metals and Hard Materials,1998,16(4-6):409-416. |
| [5] | Jianfei Sun;Faming Zhang;Jun Shen .Characterizations of ball-milled nanocrystalline WC-Co composite powders and subsequently rapid hot pressing sintered cermets[J].Materials Letters,2003(21):3140-3148. |
| [6] | 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. |
| [7] | Mamoru Omori .Sintering, consolidation, reaction and crystal growth by the spark plasma system (SPS)[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(2):183-188. |
| [8] | 赵志伟,刘颖,曹泓,高升吉,涂铭旌.前驱体碳热还原法制备纳米V8C7粉末[J].稀有金属材料与工程,2007(z3):104-107. |
| [9] | 刘兵海;张跃;欧阳世翕 .超细晶粒WC-Co硬质合金的收缩与晶粒长大[J].华东理工大学学报,1999,25(05):494-498. |
| [10] | 马淳安,褚有群,黄辉,成旦红,周邦新.WC-Co硬质合金的相组成及其相变[J].浙江工业大学学报,2003(01):1-6. |
| [11] | 王洪涛,王旭,余永宁.纳米WC/Co硬质合金粉末烧结早期的晶粒长大研究[J].稀有金属与硬质合金,2005(01):18-21. |
| [12] | FANG Z;Eason J W.Study of nanost ructured WC-Co composites[A].Reutte:Plansee A G,1993:625. |
| [13] | 李蔚,高濂,郭景坤,宫本大树,DIAZ DE LA TORRE Sebastian.放电等离子快速烧结纳米3Y-TZP材料[J].无机材料学报,1999(06):985-988. |
| [14] | 陈亚军,邹慧.超细WC-Co硬质合金的烧结[J].中国民航学院学报,2003(01):14-18. |
| [15] | W. D. SCHUBERT;A. BOCK;B. LUX .General Aspects and Limits of Conventional Ultrafine WC Powder Manufacture and Hard Metal Production[J].International Journal of Refractory Metals & Hard Materials,1995(5):281-296. |
| [16] | Sadangi R K;McCandish L E;Kear B H et al.Grain growth inhibition in liquid phase aintered nanophase WC/Co alloys[J].Advances in Powder Metallurgy and Particulate Materials,1998,13(01):51-59. |
| [17] | Yamazaki K;Risbud S H et al.PAS(Plasma activated sintering):transient sintering process control for rapid consolidation of powders[J].Journal of Materials Processing Technology,1996,56(1-4):955-965. |
| [18] | 史晓亮,段隆臣,汤凤林,杨凯华.提高金刚石-硬质合金超硬复合体性能的研究[J].探矿工程-岩土钻掘工程,2002(02):53-56. |
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