Wear characteristics of Fe-based diamond composites with cerium oxide (CeO2) reinforcements |
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| Affiliation: | 1. Laboratory of Special Ceramics and Powder Metallurgy, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, China;3. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China;1. School of Physics, University of the Witwatersrand, South Africa;2. DST-NRF Centre of Excellence in Strong Materials, hosted by the University of the Witwatersrand, South Africa;3. Academic Development Unit (ADU), University of the Witwatersrand, South Africa;4. School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand, South Africa;5. Pilot Tools (Pty) Ltd., Johannesburg, South Africa;6. School of Chemical and Metallurgical Engineering, University of the Witwatersrand, South Africa;1. CD Laboratory for Extractive Metallurgy of Technological Metals, Nonferrous Metallurgy, Montanuniversitaet Leoben, Franz-Josef-Str. 18, A-8700 Leoben, Austria;2. CERATIZIT Austria GmbH, Metallwerk-Plansee-Str. 71, A-6600 Reutte, Austria;1. School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, Private Bag 3, Wits 2050, South Africa;2. DST-NRF Centre of Excellence in Strong Materials, South Africa;3. Tribo-Systems for Industrial Tools and Machinery Research, Department of Teacher Training in Mechanical Engineering, King Mongkut''s University of Technology North Bangkok, Bangkok, Thailand;4. School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand, Johannesburg, South Africa |
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| Abstract: | To obtain better wear resistance for the metal bond diamond grinding tools, cerium oxide (CeO2) with different contents were introduced into Fe-based diamond composites. A pin-on-disc wear test was performed to assess the wear properties of the fabricated specimens, and the morphological properties of the worn surface and corresponding wear debris were evaluated to examine the wear mechanism. Results show that the Fe-based diamond composites with CeO2 addition exhibited an improvement in the densification, mechanical properties and wear resistance. The original long rod-shaped CeO2 particles converted into the spherical particles <1 μm, dispersing in the Sn phase. The cerium oxide acted as a sintering aid, promoting the diffusion of Fe in the Sn phase during the sintering process. The dominant wear mechanism of the specimen with CeO2 addition was the adhesive wear, compared with the abrasive wear in the specimen without CeO2. With the increase in CeO2 addition amount, the wear rate decreased. But an excessive amount of CeO2 was detrimental to mechanical and wear performances. The optimal amount of cerium oxide to achieve the best wear resistance was investigated to be 0.8 wt%. |
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