Molybdenum disilicide-silicon nitride bushing nozzles tailor-made for basalt fibers production |
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| Affiliation: | 1. ENEA – Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Brindisi Research Centre, S.S. 7, Km. 706, 72100 Brindisi, Italy;2. TERMOTECH ECO s.r.l., Via Francesco Icace 1, 84131 Salerno, Italy;3. ENEA – Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Casaccia Research Centre, Via Anguillarese 301, 00123 Roma, Italy;1. Departamento de Química (QMC), Universidade Federal de Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil;2. Departamento de Química, Universidade Federal do Paraná (UFPR), 81531-980 Curitiba, PR, Brazil;3. Instituto Nacional de Ciência e Tecnologia de Energia e Ambiente (INCT E&A), Universidade Federal da Bahia (UFBA), 40170-115 Salvador, BA, Brazil;4. Departamento de Engenharia Química (EQA), Universidade Federal de Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil;5. Departamento de Engenharia de Materiais e Cerâmica, Universidade de Aveiro, 3810-193 Aveiro, Portugal;1. Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;2. Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, P.O. Box-1988, Najran 11001, Saudi Arabia;3. Department of Chemistry, College of Science and Arts, Najran University, P.O. Box-1988, Najran 11001, Saudi Arabia;4. PG Department of Chemistry, JCDAV College (Panjab University), Dasuya 144205, Punjab, India;5. Research Centre, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. Wuhan Iron and Steel Group Refractory Materials Limited Liability Company, Wuhan 430081, China;1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2. National Engineering Research Centre for Magnesium Alloys, Chongqing 400030, China;3. Department of Applied Physics, Chongqing University, Chongqing 400044, China;4. Department of Physics, COMSATS Institute of Information Technology, Lahore 54000, Pakistan;5. Department of Physics, University of Sargodha, Sargodha 40100, Pakistan;1. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China;2. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | A carefully comparative study of several ceramics compounds allowed the identification of MoSi2 blended with Si3N4 as a suitable material for the realization of bushing nozzles, specifically designed for basalt fibers production. Degradation static tests were developed and performed to demonstrate the high resistance to oxidation at operating temperature of MoSi2-Si3N4 composites with respect to alumina, zirconia stabilized with magnesia or yttria, pure MoSi2, pure Si3N4, and MoSi2 englobing SiC. Moreover, the MoSi2-Si3N4 composites resulted resistant to corrosion and chemical inert with respect to oxidizing components present in basalt melts.Bushings in MoSi2-Si3N4 were obtained by using hot isostatic pressing and were processed through mechanical drilling. The basalt fibers produced with the MoSi2-Si3N4 bushing showed a constant diameter and a regular surface morphology. The bushing was recovered intact without defects or fractures demonstrating the efficiency of the selected material. Replacing platinum-rhodium bushings with ceramic ones could greatly reduce costs of basaltic fibers production and could encourage the use of these eco-friendly, natural fibers as reinforcement in lightweight polymer composites. |
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| Keywords: | Molybdenum disilicide alloy Basalt rock fibers Raw material Ceramic bushing nozzles |
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