Pramono, Agus and Sulaiman, Fatah and Suryana, Suryana and Alfirano, Alfirano and Milandia, Anistasia (2020) Effect of Pressure Distribution on Hydroxyapatite (HAp) Based Hybrid Composites Made from the Milkfish Bones. Materials Science Forum, 988. pp. 182-191. ISSN 1662-9752

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Abstract

The milkfish bones (chanos-chanos forsk/CCF) which contain of Ca 4%, P 3% and protein 32% are a waste material. It is necessary to process the waste into a new product so that it can be used optimally. The milkfish content contains various metallic elements which can be combined metallurgically with aluminum (Al) as a matrix and Titanium (Ti)/magnesium (Mg) as a wetting element which will give an interface between materials. With that advantages, the milkfish bones can be used as a composite material with a content of more than one type of matrix that is being used as a composite hybrid. Milkfish bone material calcined at temperature of 500-700OC, and made into Hydroxyapatite (HAp). This material was made as reinforced by mixing on Al with Mg and lightweight metal as well so that it can be processed into hybrid composite material. The study refers to the influenced of the stress distribution at the process of composites based on CCF calcination on the mechanical properties that was produced by self-high propagating temperatures synthesis (SHS) methods. The experiment used 3 types of sample with different composition each sample. The first type of sample composition used 80% HAp, 10% Al, 4% Mg, 3% Ti and 3% Cu with a pressing operated at 461.2 MPa which resulted in maximum mechanical hardness of 167-239 HV10. The second type of sample composition used 80% HAp, 10% Al, 4% Mg, 2% Ti, 2% Cu, and an addition of 2% Al2O3 ceramics with operational pressure reached at 691.7 MPa which resulted in a hardness value of 229-349 HV10. The third type of sample composition used 80% HAp, 10% Al, 4% Mg, 2% Ti, 2% Cu and 2% SiC as a reinforced with operational pressure reached at 921.8 MPa and hardness value of 359-375 HV10.

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