Synthesis of dense MoSi₂ by high-frequency induction heated combustion and its mechanical properties

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• 作者：Hwan Cheol Kim (1)
  Choong Do Park (1)
  Jeong Wung Jeong (1)
  In Jin Shon (1) ijshon@moak.chonbuk.ac.kr
• 关键词：high ; frequency induction heated combustion ; MoSi2 ; combustion synthesis ; hardness ; fracture toughness
• 刊名：Metals and Materials International
• 出版时间：April 2003
• 出版年：2003
• 期刊代码：pc365_1598-9623
• 类别：ch
• 卷：9
• 期：2
• 页码：173-178
• 数据来源：sp

摘要

Dense MoSi₂ compound was synthesized with the high-frequency induction heated combustion synthesis method in one step from elemental powders of Mo and Si within 2 min. Simultaneous combustion synthesis and densification were carried out under the combined effects of induced current and mechanical pressure. A highly dense MoSi₂ with a relative density of up to 98%was produced with simultaneous application of 60 MPa pressure and induced current. The percentages of the total shrinkage occurring before and during the synthesis reaction were 16%and 53%, respectively. The average grain size was about 15 μm and a slight amount of Mo₅Si₃ was observed at the boundaries of the MoSi₂ grains. The fracture toughness and hardness values obtained were 3.5 MPa路m1/2 and 1050 kg/mm2, respectively. These values were similar to those of commercial ones.