以纳米TiO2/碳黑为原料,通过碳热还原法合成了粒度较小的微细TiC粉末.产物粉末的XRD研究表明,纳米TiO2碳热还原合成TiC的相演变顺序为:TiO2(Anatase)→TiO2(Rutile)→TinO2n-1(n≥3)→Ti2O3→Ti(C,0)→TiC.此外.根据反应率可将纳米TiO2碳热还原分为3个连续阶段:第一阶段为TiO2的碳热还原,产物为一系列中间钛氧化物TinO2n-1(n≥3),反应速率最慢;第二阶段主要为Ti2O3的碳化反应,产物为Ti(C,O),反应速率最快;第三阶段为Ti(C,O)与C的置换反应,产物为TiC,反应速率较快.
参考文献
| [1] | Han Jiecai et al.In-situ combustion synthesis and densification of TiC-xNi cermets[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2000,280:328. |
| [2] | Jakob Kubarsepp;Heinrich Klaasen;Juri Pirso .Behavior of TiC-base cermets in different wear conditions[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2001(3/4):229-234. |
| [3] | Pirso J;Viljus M;Letunovits S .Sliding wear of TiC-NiMo cermets[J].Tribology International,2004,37:817. |
| [4] | Rasit Koc .Kinetics and phase evolution during carbothermal synthesis of titanium carbide from carbon-coated titania powder[J].Journal of the European Ceramic Society,1997,17:1309. |
| [5] | Henry Preiss et al.Studies on the carbothermal preparation of titanium carbide from diffrerent gel precursors[J].Journal of the European Ceramic Society,1999,19:195. |
| [6] | Pierre Lefort et al.Influence of the grain size on the reactivity of TiO/C mixtures[J].Journal of Alloys and Compounds,2000,302:287. |
| [7] | Setoudeh N;Saidi A;Welbam N J .Carbothermic reduction of anatase and rutile[J].Journal of Alloys and Compounds,2005,390:138. |
| [8] | Teresiak A;Mattern N;Kubsch H et al.Structure and stability of nanocrystalline TiC-powders obtained by reactive high energy milling[J].Nano-Structured Materials,1994,4:775. |
| [9] | Shefif El-eskandarany M .Synthesis of nanocrystalline titanium carbide alloy powders by mechanical solid state reaction[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1996,27:2374. |
| [10] | 汪华林,李海林,吴东棣.自蔓延高温合成碳化钛粉末[J].稀有金属材料与工程,1995(02):8-17. |
| [11] | Zarrinfar N et al.Carbide stoichiometry in TiCx and CuTiCx produced by self-propagating high-temperature synthesis[J].Scripta Materialia,2002,46:121. |
| [12] | Yang Y F;Wang H Y;Zhao R Y et al.Effects of C particle size on the ignition and combustion characteristics of the SHS reaction in the 20 wt% Ni-Ti-C system[J].Journal of Alloys and Compounds,2008,460:276. |
| [13] | 白万杰 .等离子体气相合成法制备碳化钛陶瓷粉体的工艺[P].中国,ZL02153392.X,2005-02-16. |
| [14] | Tong Lirong et al.Synthesis of titanium carbide mano-powders by thermal plasma[J].Scripta Materialia,2005,52:1253. |
| [15] | Wang H Y et al.In situ synthesis of TiC/Mg composites in molten magnesium[J].Scripta Materialia,2003,48:1349. |
| [16] | Lee DW;Alexandrovskii S;Kim BK .Mg-thermal reduction of TiCl4+CxCl4 solution for producing ultrafine titanium carbide[J].Materials Chemistry and Physics,2004(1):23-26. |
| [17] | 向道平 .基于纳米TiO<,2>碳热还原氮化制备Ti（C，N）的相关应用基础研究[D].四川大学,2007. |
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