采用真空自耗电弧炉熔炼技术，利用钛与LaB6之间的反应原位合成了具有不同氧含量的（TiB＋La203）／Ti复合材料；分析了复合材料的物相组成、增强体形貌以及显微组织，测试了复合材料的室温、高温拉伸性能以及热稳定性。结果表明：较高氧含量的复合材料室温下强度及塑性都较低，但在高温下尤其是700℃时具有较高的抗拉强度；在650℃保温100h后，含氧量对其强度影响不大，但高氧含量的塑性较低。
The composites （TiB＋La203）/Ti （TMCs） with different oxygen contents were synthesized by in- situ reaction between Ti and LaB6 using vacuum consumable electrode arc furnace melting techniquee; the phases, reinforcements morphology and microstructure of composites were analyzed; the tensile properties at room and high temperatures, as well as the thermal stability of the composites were also tested. The results show that the TMCs with higher oxygen contents had lower strength and plasticity at room temperature, while the composite had higher tensile strength at high temperatures, especially at 700 ℃; oxygen contents had little effect on strength after heat at 650℃ for 100 h, but the ductility of the composite with high oxygen contents was lower.
参考文献
| [1] | Wang MM;Lu WJ;Qin JN;Zhang D;Ji B;Zhu F .The effect of reinforcements on superplasticity of in situ synthesized (TiB plus TiC)/Ti matrix composite[J].Scripta materialia,2006(11):1955-1959. |
| [2] | 刘小平,伏思静.原位合成TiC颗粒增强铁基复合材料的组织和性能[J].机械工程材料,2008(05):41-44. |
| [3] | Ma Z.Y.;Tjong S.C. .IN-SITU Ti-TiB METAL-MATRIX COMPOSITE PREPARED BY A REACTIVE PRESSING PROCESS[J].Scripta materialia,2000(4):367-373. |
| [4] | Zhifeng Yang;Weijie Lu;Jining Qin;Di Zhang .Microstructure and tensile properties of in situ synthesized (TiC + TiB + Nd_2O_3)/Ti-alloy composites at elevated temperature[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):185-191. |
| [5] | Lu Xiao;Weijie Lu;Zhifeng Yang .Effect of reinforcements on high temperature mechanical properties of in situ synthesized titanium matrix composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):192-198. |
| [6] | Weijie Lu;Di Zhang;Xiaonong Zhang .Microstructural characterization of TiC in in situ synthesized titanium matrix composites prepared by common casting technique[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2001(1/2):248-252. |
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