【摘要】：根據(jù)真空絕熱原理提出一種可在高溫環(huán)境下使用的新型高溫真空絕熱板(High-temperature vacuum insulation panel,HT-VIP)。在多孔碳化硅泡沫芯材表面包覆多層碳纖維布,通過(guò)化學(xué)氣相滲透(Chemical vapor infiltration,CVI)熱解碳的方法對(duì)外殼碳纖維體進(jìn)行增密,然后采用聚合物浸漬裂解(Polymer infiltration and pyrolysis,PIP)工藝制備玻璃碳對(duì)材料進(jìn)行致密化處理,最后采用低壓化學(xué)氣相沉積(Chemical vapor deposition,CVD)工藝沉積SiC涂層對(duì)材料進(jìn)行封裝,制備出一種具有耐高溫、密度低、強(qiáng)度高、低導(dǎo)熱以及抗熱沖擊的新型高溫真空絕熱復(fù)合材料。制備的致密碳纖維增強(qiáng)復(fù)合材料,材料內(nèi)部為真空狀態(tài),材料密度為0.81g/cm3,抗壓強(qiáng)度為8.75 MPa。當(dāng)溫度為100~900℃時(shí),高溫VIP有效熱導(dǎo)熱系數(shù)從0.20 W/mK逐漸增加到1.16 W/mK,比C/C和C/SiC復(fù)合材料低一個(gè)數(shù)量級(jí)。
[Abstract]:According to the principle of vacuum insulation, a new type of high temperature vacuum insulation plate (High-temperature vacuum insulation panel,HT-VIP) is proposed, which can be used in high temperature environment. The porous silicon carbide foam core material was coated with multi-layer carbon fiber cloth, and the external shell carbon fiber was densified by chemical vapor infiltration of (Chemical vapor infiltration,CVI) pyrolysis carbon, and then glass carbon was prepared by polymer impregnation cracking (Polymer infiltration and pyrolysis,PIP). Finally, the SiC coating was deposited by low pressure chemical vapor deposition (Chemical vapor deposition,CVD) process to encapsulate the material. A new type of high temperature vacuum insulation composites with high temperature resistance, low density, high strength, low thermal conductivity and thermal shock resistance was prepared. The dense carbon fiber reinforced composites were prepared in vacuum state, the density of the material was 0.81g / cm ~ 3, and the compressive strength was 8.75 MPa.. When the temperature is 100 脳 900 鈩，

本文編號(hào)：2505423