scholarly journals Effect of SiC Particle Contents and Size on the Microstructure and Dissolution of SiC-Hydroxyapatite Coatings

Coatings ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1166
Author(s):  
Li Yang ◽  
Zuli Mao
Keyword(s):  
Weight Loss ◽  
Hydroxyapatite Coating ◽  
Carbon Composites ◽  
Bone Implant ◽  
Sic Particles ◽  
Hydroxyapatite Coatings ◽  
Dissolution Properties ◽  
Structure Morphology ◽  
Ultrasound Assisted ◽  
Sic Particle

Carbon/carbon composites, when used as bone implant materials, do not adhere well to the bone tissues because of their non-bioactive characteristics. Therefore, we electro-deposited SiC-hydroxyapatite coatings (with an ultrasound-assisted step) on carbon/carbon composites. We analyzed how the content and size of the SiC particles affected the structure, morphology, bonding strength and dissolution of the SiC-hydroxyapatite coatings. The hydroxyapatite coating dissolution properties were assessed by the released Ca2+ and the weight loss. The SiC-hydroxyapatite coating on naked carbon/carbon composites showed a more compact microstructure in comparison to the hydroxyapatite coating on carbon/carbon composites. The reasons for the changes in the microstructure and the improvement in the adhesion of the coatings on C/C were discussed. Moreover, the addition of SiC particles increased the binding strengths of the hydroxyapatite coating on C/C composite, as well as reduced the dissolution rate of the hydroxyapatite coating.

CONVERSION OF INDUCTION HEATING DEPOSITED MONETITE COATING TO HYDROXYAPATITE COATING ON HT–C/C COMPOSITES BY HYDROTHERMAL TREATMENT IN KOH AQUEOUS/AMMONIA SOLUTION

2009 ◽  
Vol 16 (05) ◽  
pp. 675-681 ◽  
Author(s):  
DONG-MEI LI ◽  
XIN-BO XIONG ◽  
XIE-RONG ZENG ◽  
CHUN-LI ZOU ◽  
JI-ZHAO ZOU
Keyword(s):  
Hydrothermal Treatment ◽  
Induction Heating ◽  
Aqueous Ammonia ◽  
Scratch Test ◽  
Ammonia Solution ◽  
Carbon Composites ◽  
Aqueous Ammonia Solution ◽  
Ha Coating ◽  
Hydroxyapatite Coatings ◽  
Structure Morphology

Carbon/carbon composites with hydroxyapatite coatings are one of the attractive materials in the dental and orthopedic fields. In this study, hydrothermal treatment, in KOH aqueous and ammonia solutions, was used to convert an induction-heating-deposited monetite coating to an adherent HA coating on H2O2 treated C/C composites. The structure, morphology and chemical composition of the as-received HA coatings were characterized by XRD, FTIR, SEM and EDS. A scratch test was conducted to measure the adhesion of HA coatings to HT – C/C substrate. The results show that well-crystallized carbonate hydroxyapatite coatings could be achieved under the two reaction mediums. However, the as-obtained HA coatings after KOH hydrothermal treatment have higher crystallinity and Ca/P ratio than those after ammonia hydrothermal treatment, and reveal an average critical load of 29 N which is more than two times as high as that for HA coatings after ammonia hydrothermal treatment.

The Effect of SiC Particle Size on the Microstructure and Hardness of SiCp/Cu Composites

2014 ◽  
Vol 997 ◽  
pp. 442-445
Author(s):  
Ming Hu ◽  
Li Li Tang ◽  
Lin Shan ◽  
Yun Long Zhang
Keyword(s):  
Particle Size ◽  
Vickers Hardness ◽  
Copper Matrix ◽  
X Ray Diffraction ◽  
Chemical Plating ◽  
Hardness Tester ◽  
Sic Particles ◽  
Structure Morphology ◽  
Hot Press Sintering ◽  
Sic Particle

The chemical plating technology was applied in order to improve the weaker wettability between the copper and SiC particles for electronic packaging applications. The hot-press sintering technique was executed to fabricate SiCp/Cu composites. The influence of SiC particles size on the phase constitute, micro-structure morphology and vickers hardness were investigated in details by means of X-ray diffraction, scanning electron microscope and vickers hardness tester. The results showed that SiC particle were distributed in copper matrix uniformly and interface was clear. The relative density and vickers hardness of SiCp/Cu composites increased as SiC particle size enhanced.

An Experimental Investigation on Mechanical and Wear Properties of Al7075/SiCp Composites: Effect of SiC Content and Particle Size

2017 ◽  
Vol 140 (3) ◽  
Author(s):  
Thella Babu Rao
Keyword(s):  
Particle Size ◽  
Tensile Strength ◽  
Wear Resistance ◽  
Ultimate Tensile Strength ◽  
Matrix Material ◽  
Mechanical Tests ◽  
Experimental Investigations ◽  
Wear Properties ◽  
Sic Particles ◽  
Sic Particle

One of the major advantages of metal matrix composites (MMCs) is that their tailorable properties meet the specific requirements of a particular application. This paper deals with the experimental investigations done on the effects of the reinforcement particulate size and content on the Al7075/SiC composite. The composites were manufactured using stir casting technique. The effect of SiC particle size (25, 50, and 75 μm) and particulate content (5, 10, and 15 wt %) on the microstructural, mechanical properties, and wear rate of the composites was studied and the results were analyzed for varied conditions of reinforcement. Scanning electron microscope (SEM) examinations were used to assess the dispersion of SiC particles reinforced into the matrix alloy and was found with reasonably uniform with minimal particle agglomerations and with good interfacial bonding between the particles and matrix material. X-ray diffraction (XRD) analysis confirmed the presence of Al and SiC with the composite. The results of mechanical tests showed that the increasing SiC particle size and content considerably enhanced the ultimate tensile strength and hardness of the composites while the ductility at this condition was decreased. The highest ultimate tensile strength of 310 MPa and hardness of 126 BHN were observed for the composites containing 15 wt %. SiC at 75 μm. Lesser the wear resistance of the reference alloy while it was enhanced up to 40% with the composites. The wear resistance was increased up to 1200 m of sliding distance for all the composites, whereas for the composite containing 75 μm SiC particles, it was extended up to 1800 m.

Experimental Study of Grinding Characteristics on SiCp/Al Composites

2011 ◽  
Vol 487 ◽  
pp. 135-139 ◽  
Author(s):  
Li Zhou ◽  
Shu Tao Huang ◽  
Xiao Lin Yu
Keyword(s):  
Volume Fraction ◽  
Ground Surface ◽  
Diamond Wheel ◽  
Feed Speed ◽  
Grinding Forces ◽  
Electron Microscopic ◽  
Sic Particles ◽  
Scanning Electron Microscopic ◽  
Grinding Machine ◽  
Sic Particle

This paper deals with the grinding performances of SiCp/Al composites with higher volume fraction and larger SiC particle. The effects of the grinding parameters on the grinding force, removal mechanisms of SiC particles have been investigated. The grinding tests were carried out by using diamond wheel on surface grinding machine. The results indicate that the feed speed of worktable has more significant effect on the grinding forces than that of grinding depth. The scanning electron microscopic images of the machined surfaces indicate that the material removal of SiC particles was primarily due to the failure of the interface between the reinforcement and matrix, and resulting from microcracks along the interface and many fracture or crushed SiC particles on the ground surface.

SiC Particles Concentration Dependent the Properties of Electroless Ni-P-SiC Coatings

2012 ◽  
Vol 457-458 ◽  
pp. 146-149
Author(s):  
Yan Hai Cheng ◽  
Shi Ju Zhang ◽  
Yu Xing Peng ◽  
Fang Fang Xing ◽  
Jie Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Concentration ◽  
Composite Coatings ◽  
Sic Particles ◽  
Plating Solution ◽  
Electroless Ni ◽  
Sic Coatings ◽  
Scanning Electron ◽  
Sic Particle

In this study, Ni-P-SiC composite coatings were prepared by adding different amount of SiC particles into electroless Ni-P plating solution. The effects of SiC particles concentration in solution on depositing rate and composition of the coatings were investigated. The different SiC contents in coatings could be obtained by adjusting the amount of SiC particle concentration in electroless plating solution. Scanning electron microscopy (SEM) results indicate that SiC particles are dispersed in the composite coating and Ni-P alloy is mainly as a bond metal envelope with SiC particles. At the same time, the microhardness became increased and the wear resistance improved with the increasing of SiC content.

Study on Compressive Properties of SiC Particle Reinforced ZAlCu5Mn Composite Foams

2013 ◽  
Vol 395-396 ◽  
pp. 3-6
Author(s):  
Rong Zhen Jin ◽  
Nian Suo Xie ◽  
Jiao Jiao Li ◽  
Jing Che
Keyword(s):  
Relative Density ◽  
Volume Fraction ◽  
Testing Machine ◽  
Average Diameter ◽  
Compressive Property ◽  
Compressive Properties ◽  
Sic Particles ◽  
Composite Foams ◽  
Universal Material Testing Machine ◽  
Sic Particle

SiC particle reinforced AlCu5Mn composite foams (SiCp/ZAlCu5Mn composite foams) were fabricated by the direct foaming of the melt. The quasi-static compressive properties of SiCp/ZAlCu5Mn composite foams were tested by compressive test. The effects of SiC particle, the average diameter of pores, and the relative density on the quasi-static compressive properties of SiCp/ZAlCu5Mn composite foams were performed with the universal material testing machine. The microstructure of SiCp/ZAlCu5Mn composite was studied by SEM. The results show that choosing small size of SiC particles as reinforced material, thinning pore diameter, and increasing the relative density of SiCp/ZAlCu5Mn composite foams with the same volume fraction of SiC particles can improve the energy absorption ability under the quasi-static loading. SiCp/ZAlCu5Mn composite foams are of well compressive property. The compressive deformation course of SiCp/ZAlCu5Mn composite foams involves three stages that are the linearly elastic deformation region, the collapse plateau region, and the densification region. The test results may be influenced by strain gauge, data processing method, shape of incident wave etc.

Analysis of corrosion behaviour and surface properties of plasma-sprayed composite coating of hydroxyapatite–tantalum on biodegradable Mg alloy ZK60

2019 ◽  
Vol 53 (19) ◽  
pp. 2661-2673 ◽  
Author(s):  
Balraj Singh ◽  
Gurpreet Singh ◽  
Buta Singh Sidhu
Keyword(s):  
Corrosion Resistance ◽  
Surface Properties ◽  
Corrosion Behaviour ◽  
Surface Hardness ◽  
Mg Alloy ◽  
Hydroxyapatite Coating ◽  
Hydroxyapatite Coatings ◽  
Plasma Sprayed ◽  
Incremental Increase

Magnesium (Mg) and its alloys are promising candidates for biodegradable bio-implants. However, the excessive corrosion in the physiological environment and subsequent decline in the mechanical integrity of Mg and its alloys have limited their utility as biomaterials. In the present study, an attempt has been made to improve the corrosion resistance of Mg alloy ZK60 plasma sprayed with tantalum (Ta)-reinforced hydroxyapatite coating. The experiment was conducted with three varied levels, i.e. 10, 20 and 30 weight percent (wt%) of Ta-content in hydroxyapatite coating. The coatings were characterized and in vitro corrosion behaviour was investigated by electrochemical measurements in Ringer's solution along with the analysis of surface properties. The corrosion resistance of the Mg alloy increased with the incremental increase in Ta reinforcement in hydroxyapatite coating. An increase in the protection efficiency was analysed for the Ta-reinforced hydroxyapatite coatings (∼10%, 18% and 23% for hydroxyapatite-10Ta, hydroxyapatite-20Ta and hydroxyapatite-30Ta, respectively) as compared to the pure hydroxyapatite coating. The hydroxyapatite coating effectively increased the surface hardness of the Mg alloy and Ta reinforcement further enhanced it. Surface roughness decreased with the incremental increase in Ta-content in hydroxyapatite coating. Wettability analysis revealed the hydrophilic nature of pure hydroxyapatite and Ta-reinforced hydroxyapatite coatings. The results of the study suggest that the proposed Ta reinforcement in hydroxyapatite is potentially important for biodegradable Mg bio-implants.

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