Pengaruh %vf al2o3 dan grain refiner tib serta modifier sr terhadap karakterisasi komposit logam al356 al2o3 dengan metode stir casting = Fabrication and characterization composite al356 al2o3 with variation of volum fraction al2o3 and adition grain refiner tib also modifier sr by stir casting method (Fakultas Teknik Univerisitas Indonesia, 2014)