The Experts below are selected from a list of 1443 Experts worldwide ranked by ideXlab platform
Zainal Arifin Ahmad - One of the best experts on this subject based on the ideXlab platform.
-
the effect of sago as binder in the fabrication of alumina foam through the polymeric sponge replication technique
Journal of The European Ceramic Society, 2015Co-Authors: Abdul Rashid Jamaludin, Shah Rizal Kasim, M Z Abdullah, Ahmad Kamal Ismail, Zainal Arifin AhmadAbstract:Abstract Influence of various binders to alumina foam substrate was investigated. The substrate was prepared by the polymeric sponge replication technique using different solid loading ratios and binder agents. The slurries used showed a shear thinning behavior. During replication, a sponge template was coated in alumina Slurry, whilst Excess Slurry was removed manually. The resulting substrate have been studied via the Archimedes method, morphological and phase analysis, and compression test. The total porosities varied between each binder rose from 79.2% to 90.4% depending on their solid loading. The samples with natural binders had a bulky struts and fine surface, contrary to the PVA added samples. Upon compression test, PVA added samples destroyed in fragments whilst natural binders modified samples had a collapsed microstructure but still preserved its structural integrity. Comparison of experimental data and prediction value of Gibson and Ashby model show a quiet big gap between both values.
-
sago starch as binder and pore forming agent for the fabrication of porcelain foam
Ceramics International, 2014Co-Authors: Abdul Rashid Jamaludin, Shah Rizal Kasim, M Z Abdullah, Zainal Arifin AhmadAbstract:Abstract The aim of this study is to verify the potential of sago starch ( Metroxylon sagu ) as a binder and pore-forming agent for the fabrication of porcelain foam. The porcelain foam was fabricated via the polymeric foam replication technique. Initially, the porcelain raw material was mixed in water with several binders (respectively) to form a Slurry. Replication starts by fully submerging a compressed sponge in the Slurry. Excess Slurry was then removed by hand squeezed and pressed between two parallel plates. Subsequently, the impregnated sponge was sintered at 500 °C and up to 1250 °C for 2 h for sponge and binder removal and porcelain to mature, respectively. The results from this work showed that sago starch Slurry produced porcelain with density, total porosity and compressive strength of 0.37–0.51 g cm −3 , 79–81%, and 0.33–0.93 MPa, respectively. The increased of porosity and compressive strength are perhaps due to the addition of sago starch which changed the rheological property of the Slurry from Newtonian to pseudoplastic behavior. This results in higher value of viscosity, consequently allowing the construction of smoother and uniform cell skeleton although with existence of micro-pores on the structure, which contributed to higher compressive strength. The results from this study showed that sago starch has huge potential as a binder and a pore-forming agent, whilst providing a simpler and cheaper route for the fabrication of cellular ceramics.
Abdul Rashid Jamaludin - One of the best experts on this subject based on the ideXlab platform.
-
the effect of sago as binder in the fabrication of alumina foam through the polymeric sponge replication technique
Journal of The European Ceramic Society, 2015Co-Authors: Abdul Rashid Jamaludin, Shah Rizal Kasim, M Z Abdullah, Ahmad Kamal Ismail, Zainal Arifin AhmadAbstract:Abstract Influence of various binders to alumina foam substrate was investigated. The substrate was prepared by the polymeric sponge replication technique using different solid loading ratios and binder agents. The slurries used showed a shear thinning behavior. During replication, a sponge template was coated in alumina Slurry, whilst Excess Slurry was removed manually. The resulting substrate have been studied via the Archimedes method, morphological and phase analysis, and compression test. The total porosities varied between each binder rose from 79.2% to 90.4% depending on their solid loading. The samples with natural binders had a bulky struts and fine surface, contrary to the PVA added samples. Upon compression test, PVA added samples destroyed in fragments whilst natural binders modified samples had a collapsed microstructure but still preserved its structural integrity. Comparison of experimental data and prediction value of Gibson and Ashby model show a quiet big gap between both values.
-
sago starch as binder and pore forming agent for the fabrication of porcelain foam
Ceramics International, 2014Co-Authors: Abdul Rashid Jamaludin, Shah Rizal Kasim, M Z Abdullah, Zainal Arifin AhmadAbstract:Abstract The aim of this study is to verify the potential of sago starch ( Metroxylon sagu ) as a binder and pore-forming agent for the fabrication of porcelain foam. The porcelain foam was fabricated via the polymeric foam replication technique. Initially, the porcelain raw material was mixed in water with several binders (respectively) to form a Slurry. Replication starts by fully submerging a compressed sponge in the Slurry. Excess Slurry was then removed by hand squeezed and pressed between two parallel plates. Subsequently, the impregnated sponge was sintered at 500 °C and up to 1250 °C for 2 h for sponge and binder removal and porcelain to mature, respectively. The results from this work showed that sago starch Slurry produced porcelain with density, total porosity and compressive strength of 0.37–0.51 g cm −3 , 79–81%, and 0.33–0.93 MPa, respectively. The increased of porosity and compressive strength are perhaps due to the addition of sago starch which changed the rheological property of the Slurry from Newtonian to pseudoplastic behavior. This results in higher value of viscosity, consequently allowing the construction of smoother and uniform cell skeleton although with existence of micro-pores on the structure, which contributed to higher compressive strength. The results from this study showed that sago starch has huge potential as a binder and a pore-forming agent, whilst providing a simpler and cheaper route for the fabrication of cellular ceramics.
Shah Rizal Kasim - One of the best experts on this subject based on the ideXlab platform.
-
the effect of sago as binder in the fabrication of alumina foam through the polymeric sponge replication technique
Journal of The European Ceramic Society, 2015Co-Authors: Abdul Rashid Jamaludin, Shah Rizal Kasim, M Z Abdullah, Ahmad Kamal Ismail, Zainal Arifin AhmadAbstract:Abstract Influence of various binders to alumina foam substrate was investigated. The substrate was prepared by the polymeric sponge replication technique using different solid loading ratios and binder agents. The slurries used showed a shear thinning behavior. During replication, a sponge template was coated in alumina Slurry, whilst Excess Slurry was removed manually. The resulting substrate have been studied via the Archimedes method, morphological and phase analysis, and compression test. The total porosities varied between each binder rose from 79.2% to 90.4% depending on their solid loading. The samples with natural binders had a bulky struts and fine surface, contrary to the PVA added samples. Upon compression test, PVA added samples destroyed in fragments whilst natural binders modified samples had a collapsed microstructure but still preserved its structural integrity. Comparison of experimental data and prediction value of Gibson and Ashby model show a quiet big gap between both values.
-
sago starch as binder and pore forming agent for the fabrication of porcelain foam
Ceramics International, 2014Co-Authors: Abdul Rashid Jamaludin, Shah Rizal Kasim, M Z Abdullah, Zainal Arifin AhmadAbstract:Abstract The aim of this study is to verify the potential of sago starch ( Metroxylon sagu ) as a binder and pore-forming agent for the fabrication of porcelain foam. The porcelain foam was fabricated via the polymeric foam replication technique. Initially, the porcelain raw material was mixed in water with several binders (respectively) to form a Slurry. Replication starts by fully submerging a compressed sponge in the Slurry. Excess Slurry was then removed by hand squeezed and pressed between two parallel plates. Subsequently, the impregnated sponge was sintered at 500 °C and up to 1250 °C for 2 h for sponge and binder removal and porcelain to mature, respectively. The results from this work showed that sago starch Slurry produced porcelain with density, total porosity and compressive strength of 0.37–0.51 g cm −3 , 79–81%, and 0.33–0.93 MPa, respectively. The increased of porosity and compressive strength are perhaps due to the addition of sago starch which changed the rheological property of the Slurry from Newtonian to pseudoplastic behavior. This results in higher value of viscosity, consequently allowing the construction of smoother and uniform cell skeleton although with existence of micro-pores on the structure, which contributed to higher compressive strength. The results from this study showed that sago starch has huge potential as a binder and a pore-forming agent, whilst providing a simpler and cheaper route for the fabrication of cellular ceramics.
M Z Abdullah - One of the best experts on this subject based on the ideXlab platform.
-
the effect of sago as binder in the fabrication of alumina foam through the polymeric sponge replication technique
Journal of The European Ceramic Society, 2015Co-Authors: Abdul Rashid Jamaludin, Shah Rizal Kasim, M Z Abdullah, Ahmad Kamal Ismail, Zainal Arifin AhmadAbstract:Abstract Influence of various binders to alumina foam substrate was investigated. The substrate was prepared by the polymeric sponge replication technique using different solid loading ratios and binder agents. The slurries used showed a shear thinning behavior. During replication, a sponge template was coated in alumina Slurry, whilst Excess Slurry was removed manually. The resulting substrate have been studied via the Archimedes method, morphological and phase analysis, and compression test. The total porosities varied between each binder rose from 79.2% to 90.4% depending on their solid loading. The samples with natural binders had a bulky struts and fine surface, contrary to the PVA added samples. Upon compression test, PVA added samples destroyed in fragments whilst natural binders modified samples had a collapsed microstructure but still preserved its structural integrity. Comparison of experimental data and prediction value of Gibson and Ashby model show a quiet big gap between both values.
-
sago starch as binder and pore forming agent for the fabrication of porcelain foam
Ceramics International, 2014Co-Authors: Abdul Rashid Jamaludin, Shah Rizal Kasim, M Z Abdullah, Zainal Arifin AhmadAbstract:Abstract The aim of this study is to verify the potential of sago starch ( Metroxylon sagu ) as a binder and pore-forming agent for the fabrication of porcelain foam. The porcelain foam was fabricated via the polymeric foam replication technique. Initially, the porcelain raw material was mixed in water with several binders (respectively) to form a Slurry. Replication starts by fully submerging a compressed sponge in the Slurry. Excess Slurry was then removed by hand squeezed and pressed between two parallel plates. Subsequently, the impregnated sponge was sintered at 500 °C and up to 1250 °C for 2 h for sponge and binder removal and porcelain to mature, respectively. The results from this work showed that sago starch Slurry produced porcelain with density, total porosity and compressive strength of 0.37–0.51 g cm −3 , 79–81%, and 0.33–0.93 MPa, respectively. The increased of porosity and compressive strength are perhaps due to the addition of sago starch which changed the rheological property of the Slurry from Newtonian to pseudoplastic behavior. This results in higher value of viscosity, consequently allowing the construction of smoother and uniform cell skeleton although with existence of micro-pores on the structure, which contributed to higher compressive strength. The results from this study showed that sago starch has huge potential as a binder and a pore-forming agent, whilst providing a simpler and cheaper route for the fabrication of cellular ceramics.
Pedro Miranda - One of the best experts on this subject based on the ideXlab platform.
-
evaluation of direct light processing for the fabrication of bioactive ceramic scaffolds effect of pore strut size on manufacturability and mechanical performance
Journal of The European Ceramic Society, 2021Co-Authors: Claudia Paredes, Francisco J Martinezvazquez, Hamada Elsayed, Paolo Colombo, Antonia Pajares, Pedro MirandaAbstract:Abstract Bioactive ceramic scaffolds for bone regeneration consisting of a three-dimensional mesh of interpenetrating struts with square section were fabricated via Digital Light Processing (DLP). The ability of the technique to manufacture 3D porous structures from β-tricalcium phosphate (β-TCP) powders with different dimensions of struts and pores was evaluated, identifying the possibilities and limitations of the manufacturing process. Small pore sizes were found to seriously complicate the elimination of Excess Slurry from the scaffold’s innermost pores. The effect of the strut/pore size on the mechanical performance of the scaffolds under compressive stresses was also evaluated, but no significant influence was found. Under compressive stresses, the structures resulted weaker when tested perpendicularly to the printing plane due to interlayer shear failure. Interlayer superficial grooves are proposed as potential failure-controlling defects, which could also explain the lack of a Weibull size effect on the mechanical strength of the fabricated DLP scaffolds.
