Premium
Material Selection, Manufacturing and Performance Test of Ceramic High‐Temperature Heat Pipes Using Liquid Metals as Working Fluids
Author(s) -
Meisel Peter,
Schöne Sophie,
Lippmann Wolfgang,
Raddatz Mario,
Hurtado Antonio,
Gampe Uwe
Publication year - 2014
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201400176
Subject(s) - materials science , heat pipe , ceramic , heat exchanger , metallurgy , soldering , material selection , composite material , working fluid , alloy , heat transfer , mechanical engineering , thermodynamics , engineering , physics
Heat exchange applications at high temperatures of greater than 800 °C under corrosive or abrasive conditions require heat exchangers based on ceramic materials instead of conventionally used metals. Heat exchangers based on heat pipes are exceptionally suitable since temperature gradients and correspondent thermal stresses are inherently low for this design. At high temperatures greater than 800 °C, the structural material SSiC and working fluids sodium or zinc appear to be the most promising options. Encapsulating the working fluid in ceramic heat pipes with a sealing joint ensuring long term stability and high temperature resistance is particularly challenging. A nickel‐based alloy has been identified as solder material for SSiC heat pipes using sodium as working fluid and a glass solder was used in case of zinc filled heat pipes. Manufactured heat pipes were tested in a hot‐gas test rig at temperatures up to 1000 °C.