摘要
采用动态流变测试技术研究了Al/AP/GAP悬浮液粘弹特性,通过应变扫描分析了Al/AP/GAP悬浮液的线性粘弹区与屈服转变,通过频率扫描分析了微纳米铝粉颗粒级配对Al/AP/GAP悬浮液粘弹性的影响,并基于时温等效原理建立了储能模量主曲线。结果表明,含10%纳米铝粉的悬浮液在1、10和20 rad/s时测试的屈服点在0.010 2%~0.014 7%,流动点随频率的增大明显减小,表明悬浮液线性粘弹区几乎不变并且屈服转变加快。悬浮液的储能模量和损耗模量随着纳米铝粉含量的增加而减少。与含10%纳米铝粉的悬浮液相比,当微米铝粉占总铝粉含量的30%时,悬浮液复数粘度降低了14.69%。此外,储能模量主曲线将频率范围拓宽至约6个数量级,能够预测悬浮液在0.007 3~7 940 rad/s频率范围内的粘弹特性。
The viscoelasticity of Al/AP/GAP suspensions are studied by using dynamic rheological measurement technology. The linear viscoelastic regime and yielding transition of Al/AP/GAP suspensions are investigated through strain scanning analysis, and the effect of particle size of micron and nano aluminum powder on viscoelasticity of Al/AP/GAP suspensions is determined by frequency scanning. On the basis of the time-temperature equivalence principle, the main curve of storage modulus is also built. The results reveal that, when the suspension is tested at 1, 10 and 20 rad/s, the yield points of the suspension with 10% nano aluminum powder fall in a range of 0.010 2% to 0.014 7% and the flow points decrease significantly with an increasing frequency, which suggests that the linear viscoelastic regime of the suspension is almost unchanged and the yielding transition process is accelerated. The increased nano aluminum powder content results in lower storage modulus and loss modulus. Compared with the suspension containing 10% nano aluminum powder, the complex viscosity of the suspension reduces by 14.69% when micron aluminum powder accounts for 30% of the total aluminum powder. In addition, the main curve of storage modulus broadens the frequency range to approximately six orders of magnitude, which is capable of predicting the viscoelasticity of the suspension within the range of 0.007 3~7 940 rad/s.
作者
王亚娜
王毅
宋小兰
安崇伟
WANG Yana;WANG Yi;SONG Xiaolan;AN Chongwei(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China;School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China)
出处
《兵器装备工程学报》
CAS
CSCD
北大核心
2022年第12期215-220,共6页
Journal of Ordnance Equipment Engineering
基金
武器装备预研基金项目(6140656020201)。
