Effect of sintering temperature on the properties of porous Al<sub>2</sub>O<sub>3</sub>-10 wt% RHA/10 wt% Al composite

Ariff, Azmah Hanim Mohamed; Najib, Mohamad Aznan Mohamad; Tahir, Suraya Mohd; As’arry, Azizan; Mazlan, Norkhairunnisa

doi:10.1080/2374068x.2020.1785204

Cited by 6 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This phenomenon ascribed to the more evaporation of space holding material due to increase in sintering temperature. It is noted that increasing sintering temperature increase the pore diameter of samples but decrease the porosity of sintered samples due to sintering linear shrinkage [36][37][38][39]. However, the porosity and pore diameter of Ni 70 SH 30 and Ni 50 SH 50 foam is increased due to the temperature of sintering linear shrinkage of nickel/oxides above 800 °C [40][41][42][43].…”

Section: Characterization Of Porous Ni-nio Foammentioning

confidence: 99%

Fabrication of Ni-NiO Foams by Powder Metallurgy Technique and Study of Bulk Crushing Strength

Sarker

Rahman

et al. 2021

Trends Sci

View full text Add to dashboard Cite

Despite the importance of Nickel Oxide (NiO) in diverse functional applications, very little information is available on the mechanical properties of bulk or porous NiO or, mostly unnoticed. In this study, porous Ni-NiO foam was synthesized using space holding-powder metallurgy and sintering methods to produce opened-cell structure with macrogravel and Neolamarckia cadamba (Cadamba flower) like surface morphology. Four different types of porous Ni-NiO with different pore diameter of 35.65 ± 12.77, 36.10 ± 8.85, 68.20 ±7.36 and 62.45 ± 17.48 µm were fabricated for evaluating the effect of porosity on the mechanical properties of bulk porous Ni-NiO foam. The mechanical properties such as bulk crushing force of as synthesized Ni-NiO foam with various porosities such as 20.55, 27.35, 27.85 and 28.82 % exhibited the average crushing load of 115.40, 39.95, 138.10 and 151.20 N, respectively. This study suggests that crushing load of Ni-NiO foam is not only depending on the porosity but also on the sintering temperature and crystallite sizes of NiO. HIGHLIGHTS Ni-NiO foam is synthesized using space holding-powder metallurgy and sintering methods Different pore diameter is fabricated for evaluating the effect of porosity on the mechanical properties of bulk porous Ni-NiO foam Crushing strength of Ni-NiO foam is not only depending on the porosity but also on the sintering temperature and crystallite sizes of NiO GRAPHICAL ABSTRACT

show abstract

Section: Characterization Of Porous Ni-nio Foammentioning

confidence: 99%

Fabrication of Ni-NiO Foams by Powder Metallurgy Technique and Study of Bulk Crushing Strength

Sarker

Rahman

et al. 2021

Trends Sci

View full text Add to dashboard Cite

show abstract

“…Generally, the primary advantage of RHA is its tendency to improve the mechanical properties and characteristics of porous metal due to the presence of silicon dioxide within its chemical constituents. RHA and its superior properties have served in industries from gas/liquid filters, catalyst carriers, and removal of diesel particulates to lightweight structures [1]. RHA is produced from the burning of rice husk (RH) which is found at the outermost layer of paddy grains that were separated from milled rice grains during the milling process [2].…”

Section: Introductionmentioning

confidence: 99%

“…With the aid of a high-quality boiler, RHA can be produced effectively and thus serves a great advantage in not only energy generation through combusting RH but also can be utilized in silica production, as mentioned above. Moreover, depending on the technological capabilities as well as burning conditions, RHA tends to be presented in different colors varying from greyish white to pink depending on its reactiveness and the presence of chemical constituents [1,3]. Abdullah et.…”

Section: Introductionmentioning

confidence: 99%

Rice Husk Ash as Pore Former and Reinforcement on the Porosity, Microstructure, and Tensile Strength of Aluminum MMC Fabricated via the Powder Metallurgy Method

et al. 2022

Self Cite

View full text Add to dashboard Cite

The handling of rice husk ash (RHA) has been raising environmental concerns, which led to the consideration of incorporating RHA in aluminum metal matrix composite fabrication. Due to the high silicon dioxide content of RHA, it can assist in enhancing both the properties and functionality of pure aluminum. In this research, the fabrication of aluminum metal matrix composite was carried out by utilizing different compositions of RHA, including weight fractions of 10 wt.%, 15 wt.%, and 20 wt.% via a powder metallurgy approach. The element powders, including aluminum and RHA, and magnesium stearate as a binder, were mixed, compacted, and sintered to attain a composite sample in the form of a pellet. The pellet was then characterized using field emission scanning electron microscopy (FESEM-EDX) to identify the pore structure and size for each RHA composition. The samples were also mechanically tested via Archimedes’ Principle and Brazilian Testing to identify their density, porosity, and tensile strength, respectively. The total porosity of RHA-15 wt.% was found to be the highest at 19.19%, yet with the highest tensile strength at 5.19 MPa due to its low open porosity at 4.65%. In contrast, the total porosity of RHA-20 wt.% was found to be slightly lower at 15.38%, with the highest open porosity at 6.95%, which reduced its tensile strength to 5.10 MPa, therefore indicating that reducing open porosity through controlling the composition of reinforcement tends to enhance the mechanical strength of aluminum metal matrix composites.

show abstract

Review of the developments in composite materials over the last 15 years

Kabir¹,

Shahed²,

Ador³

et al. 2024

Comprehensive Materials Processing

View full text Add to dashboard Cite

Effect of sintering temperature on the properties of porous Al₂O₃-10 wt% RHA/10 wt% Al composite

Cited by 6 publications

References 17 publications

Fabrication of Ni-NiO Foams by Powder Metallurgy Technique and Study of Bulk Crushing Strength

Fabrication of Ni-NiO Foams by Powder Metallurgy Technique and Study of Bulk Crushing Strength

Rice Husk Ash as Pore Former and Reinforcement on the Porosity, Microstructure, and Tensile Strength of Aluminum MMC Fabricated via the Powder Metallurgy Method

Review of the developments in composite materials over the last 15 years

Contact Info

Product

Resources

About

Effect of sintering temperature on the properties of porous Al2O3-10 wt% RHA/10 wt% Al composite

Cited by 6 publications

References 17 publications

Fabrication of Ni-NiO Foams by Powder Metallurgy Technique and Study of Bulk Crushing Strength

Fabrication of Ni-NiO Foams by Powder Metallurgy Technique and Study of Bulk Crushing Strength

Rice Husk Ash as Pore Former and Reinforcement on the Porosity, Microstructure, and Tensile Strength of Aluminum MMC Fabricated via the Powder Metallurgy Method

Review of the developments in composite materials over the last 15 years

Contact Info

Product

Resources

About

Effect of sintering temperature on the properties of porous Al₂O₃-10 wt% RHA/10 wt% Al composite