Abstract:
PURPOSE: A manufacturing method of a fuel cell separator is provided to improve corrosion resistance, electric conductivity, and strength of a fuel cell separator by uniformly coating an oxide nickel-including yttria-stabilized zirconia on the surface of a stainless steel separator. CONSTITUTION: A manufacturing method of a fuel cell separator comprises a step of manufacturing a sol-gel solution by dissolving a nickel precursor, yttrium precursor, and zirconium precursor into a solvent; a step of dip-coating the stainless steel with the sol-gel solution; and a step of heat-treating the stainless steel. The separator is coated with a NiO-YSZ layer. The thickness of the coating layer is 0.1-1 micron. The content of Ni is 5-25 wt% based on the total weight of the NiO-YSZ coating layer.
Abstract:
PURPOSE: A fused friction material and a vehicle brake including the same are provided to be stable due to the change of frictional coefficient according to speed and braking deceleration and to improve frictional characteristic due to an excellent resistance to a fade. CONSTITUTION: A fused friction material comprises a low-steel friction material and a non-steel friction material. The low-steel friction material and the non-steel friction material are alternately arranged. The volume ratio of the alternated low-steel friction material and non-steel friction material is 3:1-1:3. The form of the low-steel friction material and non-steel friction material includes a triangle, a square, a trapezoid, a honeycomb, a polygon, an amorphous, a mosaic type, or the mixture of the same. The low-steel friction material includes textile material, binder, abrasive, solid lubricant, friction modifier, and filler.
Abstract:
PURPOSE: A non-steel friction material and a vehicle brake including the same are provided to reduce manufacturing costs by using not only modified phenol resin but also commercial phenol resin as binder. CONSTITUTION: A non-steel friction material comprises a solid lubricant whose volume percentage is 12-14% and an abrasive material whose volume percentage is 14-16%. The solid lubricant comprises graphite, antimonous sulphide or the mixture of the same. The abrasive material comprises zircon, muscovitum, triiron, tetraoxide, or the mixture of the same. The friction material includes textile material, binder, filler, and friction modifier. The volume percentage of the binder is 16-18%. The volume percentage of the filler is 6-10%. The Volume percentage of the friction modifier is 18-20%.
Abstract:
융합형 마찰재 및 이를 포함하는 차량용 브레이크가 제공된다. 본 발명에 따른 융합형 마찰재는 로스틸계 마찰재와 논스틸계 마찰재를 포함하는 것을 특징으로 한다. 본 발명에 따른 융합형 마찰재는 로스틸계 마찰재와 논스틸계 마찰재를 융합함으로써 시너지 효과를 발휘하는 새로운 개념의 마찰재로서, 속도 및 제동 감속도에 따른 마찰계수의 변화가 적어 안정적이며, 페이드에 대한 저항력이 우수하여 마찰 특성 면에서 뛰어난 효능을 가질 수 있다.
Abstract:
로스틸계 마찰재 및 이를 포함하는 차량용 브레이크가 제공된다. 본 발명에 따른 로스틸계 마찰재는 입경이 180∼220㎛인 고체 윤활제와 입경이 0.5∼10㎛인 연마재를 포함하는 것을 특징으로 한다. 본 발명에 따른 로스틸계 마찰재는 속도 및 제동 감속도에 따른 마찰계수의 변화가 적어 안정적이며, 페이드에 대한 저항력이 우수하여 마찰 특성 면에서 뛰어난 효능을 가질 수 있다.
Abstract:
PURPOSE: A low-steel friction material and a vehicle brake including the same are provided to improve frictional characteristic due to the change of frictional coefficient according to speed and braking deceleration and due to an excellent resistance to a fade. CONSTITUTION: A low-steel friction material comprises: a solid lubricant whose grain size is 180-220 micron; and an abrasive material whose grain size is 0.5-10 micron. The solid lubricant includes graphite, antimonous sulphide, zinc sulfide, copper sulfide, or the mixture of the same. The abrasive includes zirconium silicate, alumina, silicon dioxide, magnesium oxide, or the mixture of the same. The volume percentage of the solid lubricant is 13-15%. The volume percentage of the abrasive is 4-6%. The friction material includes textile material, binder, filler, and friction modifier.
Abstract:
PURPOSE: A polyamide based resin composition and a worm gear containing thereof are provided to offer the excellent strength and the low frictional coefficient of the composition to the worm gear. CONSTITUTION: A polyamide based resin composition contains a polyamide system resin and a glass fiber. The polyamide system resin contains compounds selected from polyamide 66 or polyamide 612. The glass fiver is surface-processed with ethylene-acrylic ester-glycidyl methacrylate. A worm gear is produced by preparing the resin composition, and molding the resin composition.