采用粉末冶金制备技术,以粗WC粉末、Co粉和WC+Ni3Al预合金粉末为原料制备出WC-40vol％(Co-Ni3Al)硬质合金.利用扫描电镜和透射电镜研究了不同Ni3Al含量对WC-40vol％(Co-Ni3Al)硬质合金中WC晶粒形状的影响规律.结果表明:W在Co粘结相中的固溶度接近25.4 wt％,而W在Ni3Al粘结相中的固溶度接近9.5 wt％,随着Ni3Al含量的增加,粘结相对W的固溶度减小,合金中的WC晶粒圆钝和细小;WC晶粒表面上出现明显的台阶.相应的,延长烧结时间,WC-Co-Ni3Al硬质合金具有与WC-Co硬质合金相同的WC生长行为,WC-40vol％(Co-Ni3Al)硬质合金中的WC晶粒表面上的台阶处出现明显的刻面.
参考文献
| [1] | Correa E;Santos J;Klein A .Microstructure and mechanical properties of WC Ni-Si based cemented carbides developed by powder metallurgy[J].International Journal of Refractory Metals & Hard Materials,2010,28(5):572-575. |
| [2] | M. Ahmadian;T. Chandra;D. Wexler;A. Calka .Effect of Boron on the WC Morphology in Sub Micron Tungsten Carbide-Aluminide Composites[J].Materials Science Forum,2007(1):675-678. |
| [3] | 饶承毅,龙坚战,袁红梅.Ni含量对粗晶WC-Co-Ni硬质合金组织和性能的影响[J].硬质合金,2012(01):11-14. |
| [4] | 龙坚战.陶瓷基金属间化合物复合材料的研究进展[J].硬质合金,2011(01):66-72. |
| [5] | 张忠健,龙坚战.碳化钨/金属间化合物硬质合金的研究进展[J].硬质合金,2012(06):378-386. |
| [6] | Tiegs T;Alexander K;Plucknett K et al.Ceramic composites with a ductile Ni3Al binder phase[J].MATERIALS SCIENCE & ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,1996,209(1):243-247. |
| [7] | M. Ahmadian;D. Wexler;T. Chandra .Abrasive wear of WC-FeAl-B and WC-Ni_3Al-B composites[J].International Journal of Refractory Metals & Hard Materials,2005(3):155-159. |
| [8] | Becher P F;Plucknett K P .Properties of Ni3Al-bonded titanium carbide ceramics[J].Journal of the European Ceramic Society,1998,18(4):395-400. |
| [9] | Plucknett K P;Tiegs T N;Becher P F.Ductile intermetallic toughened carbide matrix composites[A].Cocoa Beach,Fla,USA:American Ceramic Society,1996:106-115. |
| [10] | Almond E;Roebuck B .Identification of optimum binder phase compositions for improved WC hard metals[J].MATERIALS SCIENCE & ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,1988,105-106:237-248. |
| [11] | Talanova G V;Padalko A G;Panov V S et al.Effeet of barothermal processing on the structure and properties of a WC-Ni3Al alloy[J].Inorganic Materials,2008,44(3):244-247. |
| [12] | Nishigaki K;Doi H;Yukawa N et al.Binder phase strengthening through T‘ precipitation of WC-Co-Ni-Cr-Al hard alloys[J].Proceedings of the 1 1th International Plansee Seminar,1985,2:487-508. |
| [13] | Ralf-Peter Berber;Wolf-Dieter Schubert;Benno Lux .Hardmetals with "rounded" WC grains[J].International Journal of Refractory Metals & Hard Materials,2006(5):360-364. |
| [14] | 龙坚战,张忠健,徐涛,彭文,魏修宇,陆必志,李仁琼.Ni+Al元素粉末法制备WC-Ni3Al-B复合材料[J].中国有色金属学报（英文版）,2012(04):847-852. |
| [15] | Kim S;Han S H;Park J K et al.Variation of WC grain shape with carbon content in the WC-Co alloys during liquid-phase sintefing[J].Scripta Materialia,2003,48(5):635-639. |
| [16] | I. Konyashin;S. Hlawatschek;B. Ries .On the mechanism of WC coarsening in WC-Co hardmetals with various carbon contents[J].International Journal of Refractory Metals & Hard Materials,2009(2):234-243. |
| [17] | C.M. Fernandes;A.M.R. Senos .Cemented carbide phase diagrams: A review[J].International Journal of Refractory Metals & Hard Materials,2011(4):405-418. |
| [18] | Tiegs T;Menchhofer P;Plucknett K P.Hardmetals based on Ni3Al as the binder phase[A].Anaheim,California,1995:211-218. |
| [19] | V. S. Panov;M. A. Gol'dberg .INTERACTION OF TUNGSTEN CARBIDE WITH ALUMINUM NICKELIDE Ni_3Al[J].Powder Metallurgy and Metal Ceramics,2009(7/8):445-448. |
| [20] | Aurelie Delanoe;Sabine Lay .Evolution of the WC grain shape in WC-Co alloys during sintering: Effect of C content[J].International Journal of Refractory Metals & Hard Materials,2009(1):140-148. |
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