Ceramic protection plates brazed to aluminum brake discs |
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| Affiliation: | 1. Empa – Swiss Federal Laboratories for Materials Science and Technology, Laboratory for High Performance Ceramics, Überlandstrasse 129, 8600 Dübendorf, Switzerland;2. Listemann Technology AG, Wirtschaftspark 34, P.O. Box 247, LI-9492 Eschen, Liechtenstein;3. CRF – Centro Ricerche Fiat, Strada Torino 50, Orbassano, Italy;4. Fagor Ederlan – Edertek, Garaia Berrikuntza Gunea, Isasi Kalea, 6 – Posta K. 19, 20500 Arrasate-Mondragón, Gipuzkoa, Spain;5. POLITO – Politecnico di Torino, DISAT – Department of Applied Science and Technology, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy;6. IK4 TEKNIKER, Parke Teknologikoa, Calle Iñaki Goenaga 5, 20600 Eibar, Gipuzkoa, Spain;1. Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan;2. Deanship of Scientific Research, College of Engineering, King Saud University, PO Box 800, Riyadh, 11421, Saudi Arabia;3. Chemical Engineering Department, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia;4. Department of Physics, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan;1. Ceramic Materials Engineering, University of Bayreuth, Ludwig-Thoma-Str. 36b, 95447 Bayreuth, Germany;2. Center for High Temperature Materials and Design (HTL), Bayreuth, Fraunhofer ISC, Germany;3. Audi AG, Ingolstadt, Germany;4. Engineering Design and CAD, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany;1. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi''an, 710072, China;2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi''an, 710072, China |
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| Abstract: | Aluminum alloys are light-weight and one of the most interesting material solutions to optimize the strength/weight ratio to reduce car weight; however they are also relatively soft and therefore cannot be used for intensive wear applications. We developed an aluminum alloy part combined with hard and wear-resistant Al2O3-based ceramic plates on the surface for demanding mechanical parts for automotive industry such as disc brakes.Tribological tests of various engineering ceramic materials were performed in order to find a ceramic material with a combination of coefficient, wear resistance and thermal energy dissipation for the car brakes. Al2O3-based ceramic showed promising properties, as well as being cost effective.Two different approaches to braze ceramic on aluminum were investigated. A two-step brazing process using Cu-Sn-Ti-Zr filler alloy and a single step ultrasonic active soldering with Sn-Ag-Ti filler alloy. Larger areas of aluminum could be covered with a segmented brake design in which many ceramic plates were joined surface. Comparable tribological properties to those of the bulk ceramic material were achieved. |
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| Keywords: | Ceramic Wear resistant Soldering Brazing Aluminum brake disc |
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