Abstract:
본발명은, 육방정질화붕소를염기조건하에서기계적박리하는단계를포함하는육방정질화붕소나노시트제조방법, 육방정질화붕소나노시트-고분자복합소재제조방법, 이를이용하여제조된육방정질화붕소나노시트및 육방정질화붕소나노시트-고분자복합소재에관한것이다. 본발명을이용하여고품질의육방정질화붕소나노시트를안전한공정으로대량제조할수 있으며, 또한육방정질화붕소나노시트가균일하게분산된육방정질화붕소나노시트-고분자복합소재를제조할수 있다.
Abstract:
The present application relates to a silicon carbide based composite material and a manufacturing method thereof. The manufacturing method of the silicon carbide based composite material comprises of the following steps: preparing a carbon preform by carbonizing wood; producing the high-density carbon preform by impregnating the carbon preform to a carbon-based resin; and impregnating the high-density carbon preforms to a silicon.
Abstract:
질화물 강화 텅스텐 나노복합재료가 제공된다. 본 발명에 따른 질화물 강화 텅스텐 나노복합재료는 텅스텐 금속 기지 내부에 질화물 세라믹 나노입자가 균일하게 분산되어 있는 것을 특징으로 하며 밀도, 압축강도 및 경도가 우수하기 때문에 국방 무기, 항공기 또는 로켓의 추진기관에 사용되는 내열부품 등 다양한 분야에 활용할 수 있다.
Abstract:
PURPOSE: Tungsten nanocomposites reinforced with nitride ceramic nanoparticles and a method for fabricating the same are provided to uniformly nitride ceramic nanoparticles in a tungsten matrix by arranging the pre-set ratio of the nitride ceramic nanoparticles in the tungsten nanocomposites. CONSTITUTION: Nitride ceramic nanoparticles are uniformly dispersed in a tungsten matrix. A mechanical alloying method using high energy milling process is implemented to the mixture to obtain tungsten nanocomposites reinforced with nitride ceramic nanoparticles. 0.1 to 50 volume% of the nitride ceramic nanoparticles are arranged in the tungsten nanocomposites reinforced with nitride ceramic nanoparticles. The nitride ceramic nanoparticles include one or more selected from a group including ZrN, HfN, BN, AlN, Si_3N_4, TiN, TaN, Ta_2N, VN, CrN, Cr_2N, Mo_2N, NbN, WN, and W_2N.
Abstract:
본원은, 기지 세라믹 내에 분산되고 상기 기지 세라믹의 강화재로서 작용하는 표면 개질된 육방정 질화붕소 나노시트를 포함하는 육방정 질화붕소 나노시트/세라믹 나노 복합 분말, 및 그의 제조 방법, 및 상기 육방정 질화붕소 나노시트/세라믹 나노 복합 분말을 포함하는 육방정 질화붕소 나노시트/세라믹 나노 복합 소재, 및 그의 제조 방법에 관한 것이다.
Abstract:
PURPOSE: A producing method of carbon nanotube/tungsten oxide nanocomposite powder, and the carbon nanotube/tungsten oxide nanocomposite powder are provided to improve the dispersibility of a carbon nanotube for uniformly disperse the carbon nanotube. CONSTITUTION: A producing method of carbon nanotube/tungsten oxide nanocomposite powder comprises the following steps: carboxylate a carbon nanotube; dispersing the carboxylated carbon nanotube into a dispersing solvent; mixing tungstate to the dispersion solution; and drying and incinerating the mixed solution. The carboxylation process is performed by inserting the carbon nanotube into a nitric acid solution selected from the group consisting of sulfuric acid, hydrochloric acid, and acetic acid.