采用超细WC原料,在WC-20Co合金中加入纳米Y2O3,在1440℃的液相烧结温度下获得了含板状晶WC双模组织结构的合金.通过对比低于共晶温度下热压固结工艺与传统液相烧结工艺制备的WC-20Co-1Y2O3硬质合金的组织结构发现,液相烧结合金中WC板状晶是在液相烧结阶段通过液相重结晶形成的,均匀分散在合金中的Y2O3具有促进WC从粘结相中均匀析出长大、抑制WC沿c轴方向生长的作用,因而使合金中粗大的WC呈现板状晶的形貌.研究结果表明,板状晶强化的双模结构WC-20Co-1Y2O3合金具有较好的综合性能.
参考文献
| [1] | Seki Masahiro .Production of sintered hard alloy having sheetlike tungsten carbide and coated sintered hard alloy[P].Japan:5339659,1993. |
| [2] | Kinoshita Satoshi;Kitamura Kozo;Kobayashi Masaki .Platecrystalline tungsten carbide-containing hard alloy-composition for forming plate-crystalline tungsten carbide and process for preparing said hard alloy[P].Europe: 0759480,1997. |
| [3] | Schon A;Schubert W D;Lux B.WC platelet-containing hardmetals[A].Reutte Austria:Plansee Holding AG,2001:322. |
| [4] | Sommer M;Schubert W D;Zobetz E.On the formation of very large WC crystals during sintering of ultrafine WC-Co alloys[A].Reutte Austria:Plansee Holding AG,2001:299. |
| [5] | Kitamura K;Kobayashi M;Hayashi K.Properties of new WCCo base hardmetal prepared from CoxWyCz complex carbide powder instead of WC + Co mixed powder[A].Reutte Austria:Plansee Holding AG,2001:279. |
| [6] | Schiesser R;Schubert W D;Lux B.Formation of WC platelets out of substoichiometric Co-W-C precursors[A].Slovak:IMR SAS Kosice,2002:131. |
| [7] | Kinoshita Satoshi;Takeshi Saito;Kobayashi Masaki et al.Mechanisms for formation of highly oriented plate-like triangular prismatic WC gains in WC-Co base cemented carbides prepared from W and C instead of WC[J].Journal of the Japan Society of Powder and Powder Metallurgy,2001,48:51. |
| [8] | Schon A .WC plate-formation in hardmetals[D].ViennaAustria: Vienna University of Technology,2001. |
| [9] | Neumeister H .The hardness/toughness relationship of finegrained WC-Co hardmetals[D].Vienna Austria: TU-Wien,1997. |
| [10] | Schubert W D;Neumeister H;Kinger G et al.Hardness to toughness relationship of fine-grained WC-Co hardmetals[J].International Journal of Refractory Metals and Hard Materials,1998,16:133. |
| [11] | Roebuck B;Coles W .Mechanical test discriminability for WC hardmetals[J].International Journal of Refractory Metals and Hard Materials,1992,11(03):127. |
| [12] | Erik Lassner;Schubert W D.Tungsten-properties,chemistry,technologyoftheelement,alloysandchemicalcompounds[M].New York: Kluwer Academic/Plenum Publisher,1999 |
| [13] | Wang Y;Chen M;Zhou F;Ma E .High tensile ductility in a nanostructured metal.[J].Nature,2002(6910):912-915. |
| [14] | Ed Gerstner .Grain of Strength[EB/OL].http:// www nature com,2002-10-31. |
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