Abstract:
본 발명은 알루미늄 81 ~ 93 중량%, 규소 5 ~ 13 중량%, 티타늄 1 ~ 3 중량% 및 붕소 1 ~ 3 중량% 를 포함하는 알루미늄 주조재에 관한 것이다. 본 발명은 탄소나노튜브(CNT) 등의 고가재료를 사용하지 않으면서도 종래의 알루미늄 합금에 비해 탄성이 뛰어나며, 또한 종래의 알루미늄 합금의 경우, 저압주조공정에서만 적용될 수 있는 한계가 있었으나, 본 발명에서 제공하는 알루미늄 재료는 고압주조를 포함하는 일반적인 주조공정에서 모두 적용이 가능하다.
Abstract:
PURPOSE: An aluminum casting material including titanium boride and a manufacturing method thereof are provided to enable the application of an aluminum casting material in general casting processes including high-pressure casting. CONSTITUTION: An aluminum casting material including titanium boride comprises aluminum of 81-93 weight%, silicon of 5-13 weight%, titanium of 1-3 weight%, and boron of 1-3 weight%. The aluminum casting material also comprises iron, copper, manganese, magnesium, nickel or zinc, 0.1-5 parts by weight. A method for manufacturing the aluminum casting material includes a step of putting an aluminum mother alloy, comprising aluminum of 80-96 weight%, titanium of 2-10 weight%, and boron of 2-10 weight%, into molten metal including aluminum and silicon.
Abstract:
An amorphous hydrogen permeation alloy for membranes having excellent hydrogen permeability and stable structure and a manufacturing method thereof are provided. The amorphous hydrogen permeation alloy for membranes comprises: one or more first metals selected from a group containing nickel, cobalt, and iron; one or more second metals selected from a group containing niobium, tantalum, and vanadium; and one or more third metals including zirconium. The amount of the third metal can be 25at% or less. [Reference numerals] (S10) Provide a mixture by mutually mixing a first metal, a second metal, and a third metal;(S20) Provide an alloy by vacuum-dissolve the mixture;(S30) Provide a thin film by melting and spinning the alloy
Abstract:
본 발명은 표면 변형층을 통한 스피넬 산화물층의 형성을 촉진함으로서, 크롬의 휘발을 억제하고, 전기 전도도 및 내산화성을 향상시킨 연료전지 금속접속자 및 그 제조방법에 관한 것이다. 본 발명은 연료전지 금속 접속자용 페라이트계 강재의 표면에 Cr 2 MnO 4 스피넬 산화물층의 형성을 촉진시키는 표면 변형층을 포함하는 전기 전도도 및 내산화성이 우수한 연료전지 금속접속자 및 그 제조방법을 제공한다. 연료전지(Fuel Cell), 접속자(interconnector), 전기 전도도(Electrical Conductivity)
Abstract:
PURPOSE: A hydrogen storage material and a method for manufacturing the same are provided to increase the speed of storing hydrogen while reducing the temperature of emitting hydrogen. CONSTITUTION: A hydrogen storage material includes a lithium boron hydride, a calcium hydride, and a niobium fluoride. The amount of the niobium fluoride is 5wt%-30wt%. The molar ratio of the lithium boron hydride to the calcium hydride is 4-8. If the hydrogen storage material emits hydrogen, the lithium boron hydride and the calcium hydride are reacted with each other to be changed into a lithium hydride(LiH) and calcium boride.
Abstract:
PURPOSE: Stainless steel and a manufacturing method thereof are provided to improve the high temperature strength and creep resistance of stainless steel. CONSTITUTION: Stainless steel having excellent high temperature strength comprises C 0.01~0.1 weight%, Si 0.1~0.9 weight%, Mn 0.1~2 weight%, Cr 15~22 weight%, Ni 7~15 weight%, Nb 0.1~1.0 weight%, V 0.1~1.0 weight%, Co 0.1~0.3 weight%, Cu 0.01~5 weight%, Al 0.03 weight% or less, N 0.01~0.25 weight%, O 0.001~0.008 weight%, and the rest Fe and inevitable impurities.
Abstract:
A method for preparing magnesium-based hydrogen storage materials is provided to improve the hydrogen storage rate of magnesium hydroxide while minimizing the reduction of hydrogen storage capacity of the magnesium hydroxide, by using high-energy ball milling. A mixture of magnesium hydroxide and transition metal halide is formed(S10). The mixture and balls are inputted into a case(S20). Inert gas or hydrogen gas fills the case(S30). A high-energy ball milling process is performed on the mixture for 5-30 minutes(S40). In the step of forming the mixture, 0.1-5 mol% of transition metal halide powder is added based on the mixture. The balls have diameters of 5-30 mm. A weight ratio of the mixture to the balls is 1:1-1:100.