Ni-Al含能结构材料的制备和性能研究

Study on preparation and properties of Ni-Al energetic structural material

摘要:

以Ni粉和Al粉(摩尔比1:1)为原料,采用冷压-烧结法制备了Ni-Al含能结构材料。研究了烧结温度对Ni-Al含能结构材料界面扩散、力学性能、起始反应温度和能量密度等的影响。结果表明：烧结温度的提高,增加了Ni-Al颗粒间界面扩散速率,从而使含能结构材料界面粘合强度增大,拉伸和压缩强度提高,同时,能量密度降低；当烧结温度为550℃时,可获得强度和能量密度俱佳的含能结构材料,其拉伸和压缩强度分别为66.0 MPa和294.6 MPa,能量密度为436.1 J/g。

Abstract:

Ni-Al (molar ratio is 1:1) energetic structural material (ESM) was prepared by cold-pressing and sintering with Ni and Al elemental powders. The effect of sintering temperature on the interface diffusion, mechanical properties ,initial reaction temperature and energy density of Ni-Al energetic structural materials was investigated. The results demonstrate that the increasing sintering temperatures result in increase in the rate of diffusion, boundary adhesion strengthSand mechanical properties of Ni-Al ESM while the decrease in energy density. The ESM with excellent combination of both energy density and mechanical properties can be obtained by sintering Ni-Al green body at 550 ℃, of which the tensile and compressive strengths are 66.0 MPa and 294.6 MPa, respectively, the energy density is 436.1 J/g .