@article { author = {Hedjazi, J.}, title = {Improvement of Collapsibility of Sodium Silicate Bonded Cores for Aluminium Casting}, journal = {International Journal of Engineering}, volume = {2}, number = {3}, pages = {128-131}, year = {1989}, publisher = {Materials and Energy Research Center}, issn = {1025-2495}, eissn = {1735-9244}, doi = {}, abstract = {This paper examines the compressive strength of sodium silicate bonded cores for aluminum casting with different additives. Various materials are used as additives among which it is found that 5% sand size bauxite has the best effect on both gas strength and de-coring 98.5% silica content sand with 70-90 AFS No. with 4% sodium silicate is used. The results indicate that although very good collapsibility is achieved by 2% wood flour, its low gas-strength leads the casting towards various defects.}, keywords = {}, url = {https://www.ije.ir/article_71009.html}, eprint = {https://www.ije.ir/article_71009_67c241efe419eb2f727ac3fd9096aae5.pdf} }