摘要
为了研究磁介质吸波剂/多孔金属材料吸波性能,在泡沫铝合金表面涂覆了Ni-Zn铁氧体(CFe)、羰基镍粉(CNi)以及二者的复合粉,利用GJB 2038—94"雷达吸波材料反射率测试方法"中的雷达截面(RCS)法对该材料的微波反射率进行了测量.结果表明,在12~18GHz频段内,复合磁介质吸波剂/泡沫铝材料吸波性能介于单一吸波剂样品CFe与CNi之间;在26.5~40 GHz频段内,羰基镍质量分数为40%的泡沫铝复合材料吸波性能最好,当其质量分数大于40%时,材料吸波性能逐渐降低.因此,在泡沫铝合金表面涂覆适当比例的Ni-Zn铁氧体与羰基镍复合粉,可以进一步改善材料的吸波性能.
Studies on the wave absorbability of magnetic medium absorbent/M-alloy foams of which the surface were separately coated with Ni-Zn ferrite(CFe), nickel carbonyl(CNi) and the powdered compound of them. The coated Al-alloy foams were tested according to the Standard GJB 2038 - 94 "method to test the reflectivity of radar wave absorbing materials", i.e. , the RCS (radar cross-section) method. The results indicated that in the 12- 18 GHz band the wave absorbability of Al-alloy foams materials coated powder compound absorbent is founded between that of Al-alloy foams samples CFe&CNi which were coated with single absorbents samples. But in the 26.5- 40.0 GHz band, the best wave absorbability belongs to Al-alloy foams coated powder compound absorbent in which the nickel carbonyl content is 40wt%, and the absorbability goes down gradually if the nickel carbonyl content is higher than 40wt%. So, the absorbability of Al-alloy foams coated powder compound of Ni-Zn ferrite in reasonable proportion to nickel carbonyl is available to be improved.
出处
《东北大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2008年第3期354-357,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金(75102192).
关键词
多孔金属
泡沫铝
磁介质吸波剂
吸波性能
复合材料
porous metal
Al-alloy foams
magnetic medium absorbent
absorbability
composite