利用钛与碳化硼及石墨之间的自蔓延高温合成反应经普通的熔铸工艺原位合成制备了不同摩尔比值TiB和TiC增强的钛基复合材料.测定了原位合成钛基复合材料的高温力学性能.结果表明:由于增强体的原位合成,复合材料的高温拉伸性能与基体合金比较有了明显的提高.高温拉伸断裂与温度有关,温度较低时,增强体断裂是材料失效的主要原因;而随着温度的提高,增强体与基体合金界面脱粘成为材料失效的主要原因.高温拉伸时裂纹容易在短纤维状增强体TiB的端面处形核与长大从而使增强体与基体合金脱粘导致材料失效,因此加入石墨形成更多的TiC粒子有利于提高复合材料的高温力学性能.
参考文献
| [1] | Wanjara P, Yue S, Drew R A L, et al. Titanium-based composites produced by powder metallurgy [J]. Key Eng Mater, 1997, 127-131: 415-422. |
| [2] | Abkowitz S, Abkowitz S M. Particulate-reinforced titanium alloy composites economically formed by combined cold and hot isostatic pressing [J]. Industrial Heating, 1993, 60(9): 32-37. |
| [3] | Lin Y, Zee R H, Chin A. In situ formation of three-dimensional TiC reinforcements in Ti-TiC [J]. Metall Trans, 1991, A22(4): 859-865. |
| [4] | Jiang J Q, Lim T S, Kim Y J, et al. In situ formation of TiC-(Ti-6Al-4V) composites [J]. Mater Sci Tech, 1996, 12(4): 362-365. |
| [5] | Saito T, Takamiya H,Furuta T. Thermomechanical properties of P/M β titanium metal matrix composite [J]. Mater Sci Eng A, 1998, 243: 273-278. |
| [6] | Tsang H T, Chao C G, Ma C Y. Effects of volume fraction of reinforcement on tensile and creep properties of in situ TiB/TiMMC [J]. Scripta Metall Mater, 1997, 37(9): 1359-1365. |
| [7] | Rangnath S,Vijayakumar M,Subrahmanyam J. Combustion-assisted synthesis of Ti-TiB-TiC composite via the casting route [J]. Mater Sci Eng A, 1992, 149: 253-257. |
| [8] | Takahashi Teruo. In situ synthesis of TiB whisker-reinforced titanium by mechanical alloying [J]. J Japan Inst Metals (in Japanese), 1995,59(3): 244-250. |
| [9] | Soboyejo W O, Lederich R J, Sastry S M L. Mechanical behavior of damage tolerant TiB whisker-reinforced in situ titanium matrix composites [J]. Acta Metall Mater, 1994, 42 (8): 2579-2591. |
| [10] | Dubey S, Lederich R J, Soboyejo W O. Fatigue and fracture of damage-tolerant in situ titanium matrix composites [J]. Metall Mater Trans A, 1997, 28(10): 2037-2047. |
| [11] | Zhang X N, Lu W J, Zhang D, et al. In situ technique for synthesizing (TiB+TiC)/Ti composites [J]. Scripta Metall Mater, 1999, 41(1): 39-46. |
| [12] | Boyer R, Welsch G, Collings E W. Materials Properties Handbook: Titanium Alloys[M]. Materials Park, 1994. 130. |
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