Effect of Microstructure of Mo-Cu Alloy on the Thermal Expansion Coefficient

Abstract:

Mo-Cu alloy with high density can be fabricated at lower sintering temperature by high-energy ball-milling mechanical-alloying method and adding activation element. The rule of change of microstructure and its effect on the thermal expansion coefficient are studied. It is found that the holes in the Mo-Cu alloy sintered at lower temperature disappear, and Mo and Cu distribute uniformly. The Mo particles are fine-grained, and distribute uniformly in the Cu particles using the mechanical-alloying method. The change of thermal expansion coefficient with temperature is in accordance with the effect of adding activation element. There is a minor inflexion in the thermal expansion coefficient curve at 500°C. The change of thermal expansion coefficient with temperature is the same as 95% Al₂O₃ sealing material. Thus, the thermal property between Mo-Cu alloy and 95% Al₂O₃ match well.

• Periodical: Advanced Materials Research (Volume 873)
• Pages: 67-71
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.873.67
• Online since: December 2013
• Authors: Zeng Feng Li*, Hai Yan Liu, Ai Jun Li, Han Liang Zhang, Yuan Ping Huang, Ying Shi
• Keywords: Mechanical Alloying, Microstructure, Mo-Cu Alloy, Thermal Expansion Coefficient

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