Influences of atmospheric plasma spraying parameters on the porosity level of alumina coating on AZ31B magnesium alloy using response surface methodology

Thirumalaikumarasamy, D.; Shanmugam, K.; Balasubramanian, V.

doi:10.1016/j.pnsc.2012.09.004

Cited by 71 publications

(32 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Based on these models, the main and interaction effects of process parameter on corrosion rate were computed and plotted in graphical form as shown in Figs. 10 …”

Section: Resultsmentioning

confidence: 99%

“…Plasma spraying of the alumina powder was carried out using an in-house system. Details about this system are reported elsewhere [10,17]. Coating thickness for all the deposits was maintained at 200 ± 15 m. This was achieved using the following method.…”

Section: Finding the Working Limits Of The Parametersmentioning

confidence: 99%

“…As a result of the spraying process, ceramic coatings usually have open porosity and incomplete bonding between lamellae, which are deleterious when the coatings have to perform in an aggressive environment. The porosity allows a path for electrolytes from the outer surface to the substrate [10]. Therefore, reduction of porosity of the sprayed coatings plays a key role in improving the corrosion resistance of the coatings.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Corrosion performance of atmospheric plasma sprayed alumina coatings on AZ31B magnesium alloy under immersion environment

Thirumalaikumarasamy¹,

Shanmugam

Balasubramanian

2014

Journal of Asian Ceramic Societies

Self Cite

View full text Add to dashboard Cite

a b s t r a c tPlasma sprayed ceramic coatings are successfully used in many industrial applications, where high wear and corrosion resistance with thermal insulation are required. The alumina powders were plasma sprayed on AZ31B magnesium alloy with three different plasma spraying parameters. In the present work, the influence of plasma spray parameters on the corrosion behavior of the coatings was investigated. The corrosion behavior of the coated samples was evaluated by immersion corrosion test in 3.5 wt% NaCl solution. Empirical relationship was established to predict the corrosion rate of plasma sprayed alumina coatings by incorporating process parameters. The experiments were conducted based on a three factor, five-level, central composite rotatable design matrix. The developed relationship can be effectively used to predict the corrosion rate of alumina coatings at 95% confidence level. The results indicate that the input power has the greatest influence on corrosion rate, followed by stand-off distance and powder feed rate.

show abstract

“…Based on these models, the main and interaction effects of process parameter on corrosion rate were computed and plotted in graphical form as shown in Figs. 10 …”

Section: Resultsmentioning

confidence: 99%

Section: Finding the Working Limits Of The Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Corrosion performance of atmospheric plasma sprayed alumina coatings on AZ31B magnesium alloy under immersion environment

Thirumalaikumarasamy¹,

Shanmugam

Balasubramanian

2014

Journal of Asian Ceramic Societies

Self Cite

View full text Add to dashboard Cite

show abstract

“…Con base en los difractogramas es posible observar el elevado contenido de fase amorfa que presenta tanto el sistema simple constituido con un 100 % de MK (GBFS/(GBFS+MK) = 1), así como los sistemas binarios con un 60 y 80 % de GBFS (GBFS/(GBFS+MK) = 0,6 y 0,8), respectivamente. El halo ubicado en el rango 2θ entre 25 • y 35 • es atribuido fundamentalmente a los geles de aluminosilicatos, silicatos cálcicos hidratados (CSH) y silicoaluminatos cálcicos hidratados [29]. La incorporación de activadores alcalinos a la GBFS promueve la formación de precipitados alcalinos de calcio de muy baja cristalinidad [37], su crecimiento es dependiente de la concentración del ion alcalino, así como de la relación existente entre la fuentes de aluminatos y calcio [38].…”

Section: Caracterización Microestructuralunclassified

“…Ingeniería y Ciencia herramienta estadística en la optimización de parámetros de procesos en diferentes materiales cerámicos [28], [29] y en materiales cementicios [30], [31][32][33][34][35]. Este tipo de metodología igualmente ha sido aplicada en la evaluación de concretos geopoliméricos basados en escoria siderúrgica de alto horno activados alcalinamente [21].…”

unclassified

Optimización de la resistencia mecánica de cementos binarios MK/GBFS activados alcalinamente por Metodología de Superﬁcie de Respuesta

2014

View full text Add to dashboard Cite

ResumenEl presente artículo muestra la modelación y optimización de la resistencia a la compresión de un conglomerante no convencional libre de cemento Portland, el cual fue producido a partir de la activación alcalina de una mezcla binaria de un metacaolín (MK) y una escoria siderúrgica de alto horno (GBFS). Como factores de estudio se consideró una relación GBFS/(GBFS/MK) entre 0,0-0,8 y una relación molar total SiO2/Al2O3 entre 2,8-4,2. La relación SiO2/Al2O3 fue ajustada a través de la contribución del precursor (MK+GBFS) y el activador alcalino. La evaluación estadística mediante la metodología de superficie de respuesta (MSR) mostró un efecto significativo entre la relación molar SiO2/Al2O3 y el contenido de GBFS sobre la resistencia a compresión. Complementariamente se 1 Doctor en ingeniería, mgordillo@uao.edu.co, Universidad Autónoma de Occidente, Grupo Materiales Compuestos (CENM), Universidad del Valle, Cali, Colombia. Universidad EAFIT 197|Optimización de la Resistencia Mecánica de Cementos Binarios MK / GBFS Activados Alcalinamente por Metodología de Superficie de Respuesta desarrolló una caracterización microestructural a través de difracción de rayos X y microscopía electrónica de barrido. La incorporación de GBFS incrementó la cinética de reacción y la formación de una estructura más densa y compacta. Estos nuevos productos de reacción le otorgaron al material un mayor desempeño mecánico comparado con los constituidos con un 100 % de MK. Palabras clave: escoria siderúrgica de alto horno; metacaolín; cementos de activación alcalina; resistencia a la compresión; metodología de superficie de respuesta. Mechanical Strength Optimization of Alkali-Activated MK/GBFS Binary Cements Through the Response Surface Methodology AbstractThe present article shows the compressive strength modeling and optimization for a non-conventional binder free of clinker, which was produced by the alkali activation of a binary mixture of metakaolin (MK) and a granulated blast furnace slag (GBFS). A GBFS/(GBFS+MK) ratio between 0,0 and 0,8; and the overall SiO2/Al2O3 molar ratio from 2,8 to 4,2 were considered as the main factor of this study. Sodium hydroxide and sodium silicate were used as alkali activator. The overall SiO2/Al2O3 molar ratio corresponds to the silica and alumina contribution from the precursor (MK+GBFS), as well as the alkali activator used. The statistical assessment through response surface methodology (MSR) showed a considerable effect between the SiO2/Al2O3 molar ratio, GBFS content and the compressive strength. Complementary, a microstructural characterization of the materials produced through X-ray diffraction (XRD) and scanning electron microscopy (SEM) was performed. The GBFS inclusion leads to an increasing of reaction kinetic and the formation of a more compact structure. These new reaction products gives to the material a higher mechanical performance than those based on a 100% of MK. The study shows the performance prediction in materials with 7 days of curing through the adjustment of some des...

show abstract

Role of the Hybrid Addition of Carbon Nanotubes and Graphene Nanoplatelets on the Corrosion Behavior of Plasma‐Sprayed Aluminum Oxide Nanocomposite Coating

et al. 2019

View full text Add to dashboard Cite

The effect of synergistic reinforcement of two types of carbon nanofillers, carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs), on the corrosion behavior of plasma‐sprayed alumina (Al2O3) nanocomposite coating in 3.5 wt% NaCl solution is studied. Incorporation of 1 wt% CNT and 0.5 wt% GNP into the Al2O3 matrix reduces the corrosion current density of the matrix from 2.78 to 0.21 μA cm−2, which drastically leads to a 13 times reduction in the corrosion rate of the Al2O3 matrix as compared with pure Al2O3 coating. The plausible reasons to this improvement are characterized by the filling of gaps, crevices, and microholes in the Al2O3 matrix by CNTs and GNPs and hydrophobic nature as well as chemical inertness of these reinforcements to the aggressive environment. Further, the corrosion products are analyzed by X‐ray diffraction and Raman spectroscopy for a much deeper insight into the mechanism of corrosion protection by these carbonaceous reinforcements. For the first time, the effect of CNT and GNP reinforcement on the corrosion behavior of plasma‐sprayed coatings is investigated.

show abstract

Influences of atmospheric plasma spraying parameters on the porosity level of alumina coating on AZ31B magnesium alloy using response surface methodology

Cited by 71 publications

References 27 publications

Corrosion performance of atmospheric plasma sprayed alumina coatings on AZ31B magnesium alloy under immersion environment

Corrosion performance of atmospheric plasma sprayed alumina coatings on AZ31B magnesium alloy under immersion environment

Optimización de la resistencia mecánica de cementos binarios MK/GBFS activados alcalinamente por Metodología de Superﬁcie de Respuesta

Role of the Hybrid Addition of Carbon Nanotubes and Graphene Nanoplatelets on the Corrosion Behavior of Plasma‐Sprayed Aluminum Oxide Nanocomposite Coating

Contact Info

Product

Resources

About