摘要
为研究Al3Zr/Al复合燃料热性质的影响,本文采用非自耗电弧熔炼技术以及紧耦合气雾化法制备了Al3Zr/Al复合燃料,并通过激光粒度仪、XRD、SEM和热分析对复合粉末的粒径、物相、形貌、结构以及热性质做了表征。结果表明,Al3Zr/Al复合燃料主要物相组成为Al和Al3Zr。锆的加入使得Al3Zr/Al复合燃料的内部形成了金属间化合物Al3Zr内嵌到铝基体的特殊结构。Al3Zr/Al复合燃料的特殊结构以及Al3Zr的非选择性氧化促进了Al3Zr/Al复合燃料的氧化。TG-DTA结果表明Al3Zr/Al复合燃料与纯铝粉相比,放热更加集中,放热温度更加提前,表现出更强的热反应活性。此外,本文还对Al3Zr/Al复合燃料的氧化过程和氧化机理进行了探讨。
In order to study on thermal properties of Al3Zr/Al composite fuels, Al3Zr/Al composite fuels were prepared by non-consumable arc-melting technique and close-coupled gas-atomization. The laser particle size analyzer, X-ray diffraction, electron microscopy and thermal analysis were used to characterize particle size distribution, phase composition, structure, morphology and oxidation process of the composite powders, respectively. The results showed that the phase composition of Al3Zr/Al composite fuels is mainly consists of Al and Al3Zr. The addition of Zr made a special structure that intermetallic compound Al3Zr is embedded in the Al matrix form in the interior of Al3Zr/Al composite fuels. The special structure and non-selective oxidation of Al3Zr/Al composite fuels played a key role in oxidation process. The results of TG-DTA showed that, compared with pure Al powders, Al3Zr/Al composite fuels had more intensive heat release and lower exothermic temperature, showing a stronger thermal reactivity. In addition, the oxidation process and oxida-tion mechanism of Al3Zr/Al composite fuels were discussed.
出处
《材料科学》
2018年第4期305-314,共10页
Material Sciences
基金
国家自然科学金和中国工程物理研究院联合基金(U1530127)
上海航天创新基金(SAST2015096)
航天科学基金以及华中科技大学分析测试中心.
