本文關(guān)鍵詞： 短切碳纖維 吸波涂層 匹配厚度 碳纖維含量 碳纖維長(zhǎng)度 吸波性能　出處：《表面技術(shù)》2017年10期 　論文類(lèi)型：期刊論文

【摘要】：目的探究空氣層匹配厚度及碳纖維含量、長(zhǎng)度對(duì)碳纖維吸波涂層吸波性能的影響。方法以短切碳纖維為吸收劑,水性聚氨酯為基體樹(shù)脂,制備雷達(dá)吸波涂層。采用掃描電子顯微鏡和金相顯微鏡對(duì)短切碳纖維和涂層的微觀(guān)形貌進(jìn)行分析表征,將碳纖維涂層與空氣層進(jìn)行匹配,并采用矢量網(wǎng)絡(luò)分析儀測(cè)試分析涂層的吸波性能。結(jié)果當(dāng)空氣匹配層厚度由1 mm逐漸增加到3.5 mm時(shí),復(fù)合涂層的最大吸收峰由高頻逐漸向低頻移動(dòng)。匹配厚度為3 mm時(shí),反射率峰值最低(-41 d B)。匹配厚度為2.5 mm時(shí),有效吸收頻段(反射率-10 d B)最寬,為8.6~18 GHz。隨著碳纖維含量的增加,涂層的最大吸收峰頻率均呈下降趨勢(shì),有效吸收頻段向低頻移動(dòng)。碳纖維含量(質(zhì)量分?jǐn)?shù))低于0.1%時(shí),只有碳纖維長(zhǎng)度達(dá)到3 mm,涂層才具備有效吸波性能。碳纖維含量為0.1%~0.2%,碳纖維長(zhǎng)度為2 mm時(shí),涂層吸波性能最好。碳纖維含量超出0.2%,碳纖維長(zhǎng)度為1 mm時(shí),涂層已經(jīng)具備較好的吸波性能。結(jié)論通過(guò)調(diào)節(jié)空氣層匹配厚度及碳纖維含量、長(zhǎng)度,空氣層匹配碳纖維吸波涂層在不同頻段均能實(shí)現(xiàn)對(duì)電磁波的有效吸收。
[Abstract]:Objective to investigate the effect of air layer matching thickness, carbon fiber content and length on the microwave absorbing properties of carbon fiber absorbing coating. Methods short cut carbon fiber was used as absorbent and waterborne polyurethane as matrix resin. The microstructure of short cut carbon fiber and coating was analyzed and characterized by scanning electron microscope and metallographic microscope, and the carbon fiber coating was matched with air layer. The absorbing property of the coating was measured and analyzed by vector network analyzer. Results when the thickness of the air matched layer increased from 1 mm to 3.5 mm, the maximum absorption peak of the composite coating gradually shifted from high frequency to low frequency, and when the matching thickness was 3 mm, the maximum absorption peak of the composite coating moved gradually from high frequency to low frequency. When the matching thickness is 2.5 mm, the effective absorption band (reflectivity -10 dB) is the widest, which is 8.610GHz. With the increase of carbon fiber content, the maximum absorption frequency of the coating decreases, and the maximum absorption peak frequency of the coating decreases with the increase of carbon fiber content. When the carbon fiber content (mass fraction) is lower than 0.1 mm, only when the carbon fiber length reaches 3 mm, the coating has the effective absorbing property. When the carbon fiber content is 0.1 ~ 0.2mm, the carbon fiber length is 2 mm. When the content of carbon fiber exceeds 0.2 and the length of carbon fiber is 1 mm, the coating has better absorbing property. Conclusion by adjusting the matching thickness of air layer and the content of carbon fiber, the length of the coating is improved. The air layer matched carbon fiber absorbing coating can effectively absorb electromagnetic wave in different frequency range.
【作者單位】： 后勤工程學(xué)院化學(xué)與材料工程系;中國(guó)人民解放軍75752部隊(duì);
【基金】：全軍后勤科研計(jì)劃項(xiàng)目(BY115C007) 重慶市自然科學(xué)基金(cstc2014jcyj A50026)~~
【分類(lèi)號(hào)】：TB34;TQ342.742

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