Study of hydroxyapatite behaviour during sintering of 316L steel

• Autorzy: Szewczyk-Nykiel A. , Nykiel M.
• Języki publikacji: EN

Abstrakty

EN

316L stainless steel – hydroxyapatite composite biomaterials with different hydroxyapatite weight fraction in the composite were investigated. Hydroxyapatite (HAp – Ca10(PO4)6(OH)2) is well known biomaterial. HAp reveals excellent chemical and biological affinity with bony tissues. On the other hand hydroxyapatite shows low mechanical properties. The combination of very good biocompatibility of hydroxyapatite and high mechanical properties of stainless steel seems to be a good solution. In presented research natural origin hydroxyapatite and 316L austenitic stainless steel were used. In this work, metal-ceramics composites were fabricated by the powder metallurgy technology (involving pressing and sintering process). Sintering was carried out at 1250^oC in hydrogen atmosphere. The density, porosity and hardness were investigated. Metallographic microscope and SEM were carried out in order to investigate the microstructure. The horizontal NETZSCH DIL 402E dilatometer was used to evaluate the dimensional changes and phenomena occurring during sintering. The research displayed that physical properties of sintered 316L-HAp composites decrease with increase of hydroxyapatite content. Microstructure of investigated composites consists of austenitic and probably inclusions of hydroxyapatite and heterogeneous eutectic occurring on the grain boundaries. It was shown that amount of hydroxyapatite in the powder mixtures influence the dimensional changes occurring during sintering.

Słowa kluczowe

EN

biomaterials; sintering; hydroxyapatite; 316L stainless steel; properties

PL

biomateriały; spiekanie; hydroksyapatyt; stal nierdzewna 316L; właściwości

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2010
• Tom: Vol. 10, iss. 3 spec.
• Strony: 235--240
• Opis fizyczny: Bibliogr. 14 poz., il., tab., wykr.

Twórcy

autor

Szewczyk-Nykiel A.

• Cracow University of Technology, Faculty of Mechanical Engineering, Institute of Materials Engineering, Al. Jana Pawła II 37, 31-864, Krakow, Poland

autor

Nykiel M.

• Cracow University of Technology, Faculty of Mechanical Engineering, Institute of Materials Engineering, Al. Jana Pawła II 37, 31-864, Krakow, Poland

Bibliografia

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