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Journal of Materials Science

, Volume 27, Issue 6, pp 1440–1444 | Cite as

Effect of melt temperature on the formation of air pockets during splat quenching

  • Wen -Kuan Wang
  • Cheng -Tzu Kuo
  • Tsung -Shune Chin
Papers

Abstract

The effect of melt temperature on the formation of air pockets at the contact surface of the ribbons was studied. An alloy with a melting point slightly higher than room temperature (320 K) was used and was heated to 353, 573 and 773 K, respectively, to investigate the thermal effect of the melt temperature on the gas. Under high casting velocity (20 ms−1) and extremely low melting temperature (353 K), the air pockets were slender and parallel to the casting direction. The liquid melts with a higher casting temperature (773 K) induced coarse air pockets at various casting velocities, and the air pockets were coarser than those induced by the pressure of the gas boundary layer only. The heat flow analysis showed that the local pressure of the entrapped gas, built up by the thermal effect and assuming constant volume, is far greater than the pressure by the gas-boundary layer effect. Thus the thermal effect of the liquid melt should be taken into account in the formation of air pockets during splat quenching.

Keywords

Boundary Layer Heat Flow Thermal Effect Constant Volume Flow Analysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • Wen -Kuan Wang
    • 1
  • Cheng -Tzu Kuo
    • 1
  • Tsung -Shune Chin
    • 2
  1. 1.Institute of Mechanical EngineeringNational Chiao Tung UniversityHsinchuTaiwan
  2. 2.Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchuTaiwan

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