以Ti粉、纯Al和碳纤维为原料,采用浸渗-反应合成法制备出Ti-Al-C系复合材料.首先将Ti粉和碳纤维制成预制件,再将熔融的纯Al压入预制件,制备出铸态的复合材料.随后将铸态的复合材料分别在600至1260 ℃间进行原位反应,保温时间为1 h.通过SEM和EDX 分析了复合材料的显微组织和产物的元素成分,同时,采用XRD分析复合材料的相组成.结果表明,在较低温下,TiAl3和Al4C3首先生成;随着温度的进一步升高,TiAl3 分解,TiC析出;在高温下,氧化现象发生,有Al2O3生成.Ti-Al-C系复合材料在原位反应过程中遵循生成-分解-析出-氧化机制.
Ti-Al-C composite was fabricated by infiltration-in situ reaction. The as-cast material was prepared by pressing molten pure aluminum into the preform composed of titanium particles and carbon fibers. In situ reacted samples were obtained by heating the as-cast material from 600 to 1000 oC, and holding for 1 h at different temperatures. The morphology and elemental composition of samples were analyzed by scanning electron microscope and Energy dispersive X-ray, respectively. In addition, the phase composition of products was inspected by X-ray diffraction. Results show that TiAl3 and Al4C3 are formed at low temperature; with increasing of temperature, TiAl3 decomposes and TiC precipitates; at high temperature, the oxidation occurs resulting in the formation of Al2O3. The mechanism of Ti-Al-C system composite during in situ reaction procedure is as following: formation-decomposition-precipitation-oxidation.
参考文献
| [1] | Clemens H;Kestler H .[J].Advances in Engineering Materials,2000,2:551. |
| [2] | 曲恒磊,李明强,韩传玺,赵永庆,周廉,周义刚.Ti3Al基合金研究[J].钛工业进展,2003(03):11-16. |
| [3] | Hsu C J;Chang C Y;Kao P W et al.[J].Acta Materiallia,2006,54:5241. |
| [4] | 杨延清,马志军,吕祥鸿,李健康,陈彦,艾云龙.SiCf/Ti-6Al-4V复合材料的界面研究[J].稀有金属材料与工程,2006(10):1516-1521. |
| [5] | 王文生,阎蕴琪,李中奎.纤维增强TiAl基复合材料的研究[J].钛工业进展,2003(02):5-8. |
| [6] | 张全成,吴建生,何贵玉.TiNb长纤维强韧化Ti-48Al-2Cr-2Nb基复合材料的研究[J].材料科学与工艺,2000(04):77-79. |
| [7] | 朱艳,杨延清,马志军,陈彦.SiC/Ti基复合材料界面反应的热力学研究[J].稀有金属材料与工程,2002(04):279-282. |
| [8] | Cortés P;Cantwell W J .[J].Composites Science and Technology,2006,66:2306. |
| [9] | Arvieu C;Manaud J P;Chadeyron P et al.[J].Composites Part A:Applied Science and Manufacturing,1998,29A:1193. |
| [10] | Fan Z;Grant P S;Cantor B .[J].Key Engineering Materials,1997,127-137:335. |
| [11] | Jarfors A E W;Svendsen L;Wallinder M et al.[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1993,24A:2577. |
| [12] | Even C;Arvieu C;Quenisset J M .[J].Composites Science andTechnology,2008,68:1273. |
| [13] | Kerti I .[J].Materials Letters,2005,59:3795. |
| [14] | Yang B;Chen G X;Zhang J S .[J].Materials & Design,2001,22:645. |
| [15] | 郭俊明,陈克新,周和平,宁晓山.Ti-Al-C体系中添加TiAl3对燃烧合成 Ti3AlC2粉体的影响[J].金属学报,2004(01):109-112. |
| [16] | Li Y X;Hu J D;Wang H Y et al.[J].Materials Science and Engineering A,2007,458:235. |
| [17] | Asta M;Fontaine de D .[J].Physical Review B,1992,46(09):5055. |
| [18] | Ge Z B;Chen K X;Guo J M .[J].Journal of the European Ceramic Society,2003,23:567. |
| [19] | Y.X. Li;J.D. Hu;Y.H. Liu .Effect of C/Ti ratio on the laser ignited self-propagating high-temperature synthesis reaction of Al-Ti-C system for fabricating TiC/Al composites[J].Materials Letters,2007(22):4366-4369. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%