Two step porous boiling surface formation

Abstract

Abstract A method of coating metal substrates with a porous metal layer, comprising the steps of: A. PROVIDING A METAL SUBSTRATE TO BE POROUS METAL COATED; B. APPLYING A LIQUID BINDER SOLUTION CONSISTING ESSENTIALLY OF AT LEAST ONE HIGH VOLATILITY SOLVENT COMPONENT AND AT LEAST ONE LOW VOLATILITY COMPONENT IN A LAYER FROM 0.002 TO 0.040 INCH THICK ONTO SAID METAL SUBSTRATE; C. APPLYING A 0.005 TO 0.050 INCH THICK LAYER OF METAL POWDER 30-500 MESH ONTO THE BINDER LAYER SO THAT THE BINDER LAYER WETS THE METAL POWDER COATING AND IS SATURATED THEREBY AND RETAINS SUBSTANTIALLY ALL OF SAID POWDER AGAINST SAID METAL SUBSTRATE; D. EVAPORATING SUBSTANTIALLY ALL OF THE HIGH VOLATILITY COMPONENT OF SAID LIQUID BINDER SOLUTION AT ABOUT AMBIENT TEMPERATURE; E. HEATING THE METAL POWDER COATED METAL SUBSTRATE OF (D) TO TEMPERATURE SUFFICIENT TO EVAPORATE SUBSTANTIALLY ALL OF THE BINDER LOW VOLATILITY COMPONENT; F. FURTHER HEATING THE METAL POWDER COATED METAL SUBSTRATE TO TEMPERATURE SUFFICIENT TO BOND THE METAL POWDER TO ITSELF AND TO THE METAL SUBSTRATE SO AS TO FORM A POROUS METAL LAYER HAVING INTERCONNECTED SURFACE AND SUBSURFACE CAVITIES; AND G. COOLING THE POROUS METAL LAYER BONDED METAL SUBSTRATE.

Inventors

• 👤 A Rodgers
• 👤 R Weiner

Bibliographic Details