Abstract:
According to the present invention, a Cu/Al hybrid alloy material includes: one or more Cu material layers containing Cu of 70% or more; one or more Al material layers containing Al of 80% or more; and one or more intermediate metal layers which inhibits diffusion and reaction of Cu and Al in an interface of the Cu material layer and the Al material layer. The Cu/Al hybrid alloy material has a multilayered structure in which there are three layers or more and the intermediate metal layer is interposed between the Cu material layer and the Al material layer. According to the present invention, the intermediate metal layer for inhibiting diffusion and reaction of Cu and Al is interposed between the Cu material layer of which a main element is Cu and the Al material layer of which a main element is Al. Therefore, when the Cu/Al hybrid alloy material is used for bonding the Cu material layer and the Al material layer or is used at high temperatures, generation of a compound in the interface between the Cu material layer and the Al material layer can be prevented.
Abstract:
PURPOSE: A Cu-based hybrid alloy ensuring high strength, high elasticity, high corrosion resistance, wear resistance, and high conductivity at the same time and a manufacturing method thereof are provided to increase the strength of a hybrid alloy and join Cu alloys even at room temperature by using HPT(High Pressure Torsioning). CONSTITUTION: A method for manufacturing a Cu-based hybrid alloy comprises the steps of: preparing a Cu alloy A selected from the group consisting of Cu-Zn, Cu-Al, Cu-Ni-Zn, Cu-Ni-Si, Cu-Ni-Sn, and Cu-Ni-Si-Sn or melt thereof, preparing a Cu alloy B selected from the group consisting of Cu-Cr, Cu-Zr, Cu-Ag, Cu-Mg, and Cu-Cr-Zr or melt thereof, laminating the Cu alloys A and B in two or more layers and attaching the laminated alloys, and casting the melt of the Cu alloys in parallel.
Abstract:
본 발명은 생분해성 콩단백질/천연섬유 복합재 및 이의 제조방법에 관한 것으로서, 더욱 상세하게 설명하면, 생분해 특성이 우수한 콩단백질 등을 함유하는 매트릭스 수지와 단섬유, 직물 또는 부직포 형태의 천연섬유를 포함하는 생분해성 콩단백질/천연섬유 복합재 및 이의 제조방법에 관한 것이다. 본 발명의 콩단백질/천연섬유 복합재는 인장강도, 굽힘강도 등의 기계적 물성뿐만 아니라, 생분해성 역시 우수하여 매우 친환경적이다. 콩단백질, 생분해성, 복합재료
Abstract:
PURPOSE: A biodegradable soy protein/natural fiber composite is provided to ensure excellent tensile strength and flexural strength, to be biodegradable, and to be suitable as a material for exteriors of electronic parts or automobile interiors. CONSTITUTION: A biodegradable soy protein/natural fiber composite comprises a matrix resin containing soybean protein, plasticizer and cross-linking agent; a natural fiber selected from at least one or two kinds selected from jute, hemp, cotton fiber, coconut fiber, banana fiber, rice straw and wheat straw. The plasticizer is at least one or two kinds selected from glycerol, propandiol, polyethylene glycol and polyvinyl alcohol.
Abstract:
본 발명은 합금화에 의한 미세조직 및 계면조직 변화에 의해 전기적·기계적 신뢰성과 계면 신뢰성을 향상시킬 수 있는 구리 소재와 알루미늄 소재를 이용한 클래드재 및 그 제조방법에 관한 것이다. 본 발명에 의한 클래드재는, 구리 소재와 알루미늄 소재가 차례로 적층된 적층 구조를 가지며, 구리 소재는 Cu기지에 Cr, Zr, Ag, Mg, Mn, Ti, Nb, Fe, Co로 이루어지는 합금원소 그룹으로부터 선택되는 1종 이상의 합금원소를 함유하고, 알루미늄 소재는 Al기지에 Cr, Zr, Ag, Mg, Mn, Ti, Nb, Fe, Co, Si로 이루어지는 합금원소 그룹으로부터 선택되는 1종 이상의 합금원소를 함유한다. 본 발명에 의한 클래드재는 구리 소재 및/또는 알루미늄 소재에 전기전도도를 크게 저하시키지 않으면서 강도를 증진시키고 구리와 알루미늄의 반응상을 억제시키는 합금원소를 첨가함으로써, 종래의 Cu/Al 클래드재에 비해 강도와 전기적 특성이 우수하며, 계면 신뢰성과 내구성이 향상된다.
Abstract:
PURPOSE: A cooper or aluminum cladded material is provided to offer excellent electronic characteristics and intensity by increasing the intensity without reducing conductivity in a copper material or an aluminum material. CONSTITUTION: A cladded material has a lamination structure in which copper materials and aluminum material are laminated. The copper material comprises an alloy element selected from an alloy element group comprising Cr, Zr, Ag, Mg, Mn, Ti, Nb, Fe, and Co and another alloy element selected from the alloy element group comprising Cr, Zr, Ag, Mg, Mn, Ti, Nb, Fe, Co, and Si. The content of the alloy element includes the Cu base is the 0.01-10 weight % of Ag, Nb, Fe, and Cr or the 0.01-5 weights % of Zr, Mg, Mn,Ti, and Co. [Reference numerals] (10) Cu alloy; (20) AI alloy