Surface Modification and Hardness Behavior of AISI 304 as an Artificial Hip Joint using Ammonia and Scallop Shell Powder as a Nitriding Agent

Triyono, Joko; Rahajeng, Raihan; Surojo, Eko

doi:10.5109/4480714

Cited by 2 publications

(2 citation statements)

References 19 publications

(19 reference statements)

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“…Biomaterial should have resistance to corrosion, fatigue, wear, abrasion, and low surface hardness 1) . Several types of metal meet the requirements to be used as biomaterial, including SUS 316L, Ti CP Grade 1-4, and CoCr 2,3) . Co-Cr alloy is widely used to make prostheses such as orthopedic devices, dental and cardiovascular implants [4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

HA/ZrO_2 Coating on CoCr Alloy Using Flame Thermal Spray

Juliano¹,

Gapsari²,

Izzuddin³

et al. 2022

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CoCr alloy is mostly used as biomaterial implant. However, it still has several weaknesses. Therefore, it is necessary to modify the surface to improve its biocompability. This research is a preliminary study on CoCr coated with Hydroxyapatite (HA)/Zirconium Dioxide (ZrO2) using Thermal Flame Spray method. 5 % -20 % ZrO2 was mixed with HA. Besides improving the biocompatibility, ZrO2 is believed to be able to enhance the antibacterial properties. Characterization test was performed using FE-SEM. The coating was analyzed for corrosion rate, surface roughness and antibacterial activity. Adding ZrO2 to HA has been proven to be able to improve corrosion rate. Combination of 80HA-20ZrO2 is the most effective bioceramic mixture, producing lowest corrosion rate of 0.213 mm/year in HBSS media. This is due to the increased reactivity value and better passivation reaction than CoCr without coating. Antibacterial activity test revealed that the coating could form inhibitory area around the sample meaning that the coating can provide bacterial resistance for the implant.

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Section: Introductionmentioning

confidence: 99%

HA/ZrO_2 Coating on CoCr Alloy Using Flame Thermal Spray

Juliano¹,

Gapsari²,

Izzuddin³

et al. 2022

Evergreen

View full text Add to dashboard Cite

show abstract

“…Steel has great formability and durability, good tensile and yield strength, and also good thermal conductivity. These properties provide varies of steel usage from structural building to biomaterials 2) .The properties of steel depend on the microstructure and phases. Other solutes whether by design or as impurities may also affect the properties 3) .…”

Section: Introductionmentioning

confidence: 99%

The Effect of Transformation Temperature and Holding Time of Bainite Structure Formation on S45C Steel

Putra¹,

Widjana²,

Anis³

et al. 2022

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Nowadays, many applications are utilizing bainite as, for instance, lightweight design of car bodies. Bainite phase has higher hardness compared with ferrite, pearlite and austenite, but still retain better toughness than martensite. To create a bainite, however, a specific method called austempering is needed where the steel is quenched in the temperature below pearlite formation and held for a certain time. The optimalization of the quench temperature and holding time become very important. In this study, series of heat treatment processes have been carried out on the S45C steel to form bainite structure. The heat treatment processes include variations of transformation temperature from 200 -400°C, and holding time from 1 -5 hours, The lower salt-bath temperature and longer holding time generated larger amounts of bainite. In average, the highest hardness result was achieved on 5 hours holding time at 200°C with 42 HRC, and the lowest hardness was on 1 hour holding time at 400°C with 22 HRC.

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Surface Modification and Hardness Behavior of AISI 304 as an Artificial Hip Joint using Ammonia and Scallop Shell Powder as a Nitriding Agent

Cited by 2 publications

References 19 publications

HA/ZrO_2 Coating on CoCr Alloy Using Flame Thermal Spray

HA/ZrO_2 Coating on CoCr Alloy Using Flame Thermal Spray

The Effect of Transformation Temperature and Holding Time of Bainite Structure Formation on S45C Steel

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