当前位置: X-MOL 学术J. Alloys Compd. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Fabrication and characterization of the Ni–Al energetic structural material with high energy density and mechanical properties
Journal of Alloys and Compounds ( IF 6.2 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.jallcom.2020.154894
Qiang Zhou , Qiwen Hu , Bi Wang , Bingbing Zhou , Pengwan Chen , Rui Liu

Abstract The fully dense Ni–Al energetic structural material (ESM) was successfully fabricated by using shock consolidation, with no reaction between the constituents. The microstructure, quasi-static and dynamic compressive behavior and energetic characteristics were investigated. The results revealed a uniform microstructure along the cross-section and both phases were continuously distributed. No intermetallic was detected by the XRD and a 5 nm thick interlayer composed of amorphous phase and crystalline phase was observed at the Ni–Al interface by TEM. The interfacial strength was shown to have a strong effect on the ductility and the strength of Ni–Al ESM, and could be significantly improved by solid-state diffusion during the shock loading and the following heat-treatment. After heat-treatment the samples showed a high quasi-static compressive strength of 300 MPa and a ductility of 14.5%. At impact velocity above 671 m/s, the Ni–Al ESM was initiated and released a large amount of rising the shock temperature or energy. Its reaction efficiency strongly depends on the impact velocity. The good mechanical properties and energetic characteristics of the Ni–Al ESM shows a great potential for the shock consolidation in fabrication of metallic energetic structural materials.

中文翻译:

具有高能量密度和机械性能的 Ni-Al 含能结构材料的制备和表征

摘要 采用冲击固结法成功制备了全致密镍铝含能结构材料(ESM),各成分之间不发生反应。研究了微观结构、准静态和动态压缩行为以及能量特性。结果显示沿横截面的显微组织均匀且两相连续分布。XRD 没有检测到金属间化合物,TEM 在 Ni-Al 界面观察到由非晶相和结晶相组成的 5 nm 厚的中间层。界面强度对 Ni-Al ESM 的延展性和强度有很大影响,并且可以通过冲击载荷和后续热处理过程中的固态扩散显着提高。热处理后的样品显示出 300 MPa 的高准静态压缩强度和 14.5% 的延展性。当冲击速度超过 671 m/s 时,Ni-Al ESM 被引发并释放大量升高的冲击温度或能量。其反应效率很大程度上取决于撞击速度。Ni-Al ESM 良好的机械性能和能量特性在金属含能结构材料的制造中显示出巨大的冲击固结潜力。
更新日期:2020-08-01
down
wechat
bug