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:
본 발명은 스테인리스 강을 이용한 연료전지 분리판의 제조방법에 있어서, (a) 지르코늄 화합물을 포함하는 졸-겔 용액을 제조하는 단계; (b) 상기 졸-겔 용액에 스테인리스 강을 딥 코팅하는 단계; 및 (c) 상기 딥 코팅된 스테인리스 강을 열처리하는 단계를 포함하는 연료전지 분리판 제조방법을 개시한다. 본 발명에 따라 제조된 지르코니아가 코팅된 316L 스테인리스 강은 내식성이 우수하고, 또한 상용 고분자 전해질 연료전지(PEMFC)의 분리판에 요구되는 전기전도도를 갖추고 있으므로 PEMFC 분리판으로 사용가능하다.
Abstract:
A method for manufacturing a fuel cell separator and a fuel cell containing the separator are provided to improve corrosion resistance of separator. A method for manufacturing a fuel cell separator comprises: a step of making sol-gel solution containing zirconium compound; a step of deep-coating a stainless steel in the sol-gel solution; a step of heating the deep coated stainless steel; and a step of adding alcohol. The zirconium compound is a zirconium acetate hydroxide. The alcohol is ethanol. In the step of making sol-gel solution, acetone or acetylacetone are added as an additive.
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:
An apparatus for testing performance of a brake pad of a car is provided to perform a performance test in an inertial braking mode and a dragging mode as well as to make it easy to attach and detach the brake pad. An apparatus for testing performance of a brake pad(90) of a car includes a motor, a first shaft(34), a second shaft(36), an inertia wheel(46), a friction disk(52), a disk braking unit(50), an oil pressure supply unit, a torque detecting unit, and a control unit. The motor is driven by external power to generate torque. The first shaft is dynamically connected to the motor and rotates by the rotation force of the motor. The second shaft is positioned on the same line as the first shaft. The inertia wheel is fixed to the second shaft and applies inertia to a rotation of the second shaft. The friction disk is removably mounted on the second shaft and has the same rotation center as the second shaft. The disk braking unit brakes the friction disk in a thickness direction by the use of the brake pad. The oil pressure supply unit drives the disk braking unit. The torque detecting unit measures the force applied to the disk braking unit. The control unit controls the motor, a clutch, the disk braking unit, the torque detecting unit, and the oil pressure supply unit.
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:
연료전지 분리판과 이의 제조방법, 및 이를 이용한 연료전지가 제공된다. 본 발명에 따른 연료전지 제조방법은, 크롬, 활성제 및 충전제를 포함하는 분말을 스테인레스 강에 접촉시키는 단계; 및 상기 크롬을 상기 스테인레스 강에 확산시킴으로써 상기 스테인레스 강을 크롬-코팅하는 단계를 포함하며, 상기 제조방법에 따라 제조된 연료전지 분리판은 내식성과 전기 전도도가 모두 우수하다.