Italian WASP is experimenting with new method to 3d print in aluminum. It uses wet mixture of alumina (Aluminium Oxide Al2O3) extruded trough syringe extruder.
Alumina powder is mixed in different mixtures with water, denatured alcohol and glycerin and deposited on print surface.
After drying it can be heated to 1300/1500 Celsius to harden it.
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More information is needed but it could work ...
Source, in Italian (use google translate):
http://www.wasproject.it/w/2014/06/3d-printing-allumina/
Alumina powder is mixed in different mixtures with water, denatured alcohol and glycerin and deposited on print surface.
After drying it can be heated to 1300/1500 Celsius to harden it.
More information is needed but it could work ...
Source, in Italian (use google translate):
http://www.wasproject.it/w/2014/06/3d-printing-allumina/