Effect of green body density on the properties of graphite-molybdenum-titanium composite sintered by spark plasma sintering |
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| Affiliation: | 1. Nanomaterials and Nanotechnology Research Center (CINN-CSIC), Universidad de Oviedo (UO), Principado de Asturias (PA), Avda. de la Vega, 4-6, 33940, El Entrego, Spain;2. Nanoker Research S.L. Polígono Industrial de Olloniego, parcela 22ª, Nave 5, Oviedo, 33660, Asturias, Spain;3. Instituto de Tecnología de Materiales, Universitat Politècnica de València (UPV), Camino de Vera S/N, 46022, Valencia, Spain;1. Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China;2. School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu, China;1. Faculty of Dentistry, Mahidol University, Bangkok 10400, Thailand;2. Dental Biomaterials University of Florida, Gainesville, FL 32611, United States;3. Materials Science and Engineering Department, University of Florida, Gainesville, FL 32611, United States;1. Institute of Aerospace Materials and Technology, Beijing 100076, China;2. Capital Aerospace Machinery Corporation Limited, Beijing 100076, China;1. Key Laboratory of Road Construction Technology and Equipment, MOE, Chang''an University, Xi''an 710064, China;2. Strength Design and Research Department, Chengdu Aircraft Design and Research Institute, Chengdu 610041, China;3. State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Engineering Laboratory for Vibration Control of Aerospace Structures, School of Aerospace, Xi''an Jiaotong University, Xi''an 710049, China |
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| Abstract: | This manuscript contains a study about the effect of the degree of compaction of green parts on the properties of a Graphite-5.5 vol. % Molybdenum- 0.6 vol. % Titanium composite obtained by SPS. The composite, sintered at 2000 °C, below the eutectic temperature of the C-Mo system (2584 °C), exhibits different properties depending on the direction of the applied pressure. On this matter, properties are significantly better in-plane than in the other directions. Samples uniaxially pressed at 60 MPa to obtain the green compact exhibit highly improved properties which are competitive with those obtained under extreme conditions, i.e. uniaxial pressure at 300 MPa and sintering temperature > 2000 °C in presence of a liquid phase. The composite production process could be easier scaled up to the industrial level. Thus, this graphite-molybdenum-titanium composite could be used as heat sink in a panoply of applications. |
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| Keywords: | Graphite Spark plasma sintering Thermal conductivity Mechanical properties Electrical conductivity |
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