Friction Stir Processed of 6061-T6 Aluminum Alloy Reinforced with Silica from Rice Husk Ash

2014 ◽  
Vol 1024 ◽  
pp. 227-230 ◽  
Author(s):  
Hussain Zuhailawati ◽  
Mohd Noor Halmy ◽  
Indra Putra Almanar ◽  
Brij Kumar Dhindaw
Keyword(s):  
Aluminum Alloy ◽  
Rice Husk ◽  
Amorphous Silica ◽  
Rice Husk Ash ◽  
Aluminum Matrix ◽  
Acid Leaching ◽  
Friction Stir Process ◽  
Friction Stir ◽  
Friction Heat ◽  
Made In

This paper presents a development of a composite using friction stir process of AA606-T6 aluminum alloy reinforced with amorphous silica obtained from rice husk ash. The amorphous silica was produced after acid leaching and calcinations at 500°C. The silica powder was placed into a groove made in the joining line of AA606-T6 plates prior to friction stir process. Hard silica particles restricted the grain growth of aluminum matrix that contributed to a slight increase in hardness. Hardness decreases in zones under the tool was observed because AA6061-T6 alloy was sensitive to friction heat generated by the tool. Ageing at 200°C increased the hardness of the aluminum in the friction stir process zones.

Characterization of Al1100-RHA composite developed by accumulative roll bonding

2018 ◽  
Vol 53 (15) ◽  
pp. 2047-2052 ◽  
Author(s):  
Mohamad Reza Nasresfahani ◽  
Morteza Shamanian
Keyword(s):  
Rice Husk ◽  
Amorphous Silica ◽  
Accumulative Roll Bonding ◽  
Structural Changes ◽  
Rice Husk Ash ◽  
Aluminum Matrix ◽  
Silica Particles ◽  
Ash Content ◽  
Scanning Electron Micrographs ◽  
Roll Bonding

A metal–matrix composite was developed by eco-friendly accumulative roll bonding process and agricultural wastes. Amorphous silica particles were obtained by heating rice husk at 600℃ and then ball milling. Amorphous silica particles as a reinforcement were embedded in a matrix of aluminum 1100. Composites with various amounts (1%, 2%, 3%, 4%, 5%, 6%, and 7%, mass fraction) of rice husk ash particles were developed. The produced aluminum–rice husk ash composites were evaluated for structural changes and mechanical properties. The scanning electron micrographs showed a uniform distribution of rice husk ash particles and were bonded well with the aluminum matrix after 10 cycles. By increasing the rice husk ash content, the composite strength increases first and then becomes constant because of the inappropriate connection of aluminum sheets. Increasing the rice husk ash content of the composite causes the change from the ductile to a relatively brittle type of fracture.

Effect of Acid Leaching on Different State of Rice Husk

2020 ◽  
Vol 1010 ◽  
pp. 532-537
Author(s):  
Nur Haslinda Mohamed Muzni ◽  
Noorina Hidayu Jamil ◽  
Faizul Che Pa ◽  
Wan Mohd Arif
Keyword(s):  
Citric Acid ◽  
Rice Husk ◽  
Amorphous Silica ◽  
High Purity ◽  
Rice Husk Ash ◽  
Combustion Process ◽  
Acid Leaching ◽  
Silica Content ◽  
Composition Analysis ◽  
Surface Areas

Rice husks (RH) are agricultural wastes available abundantly in rice producing country. A by-product obtained from combustion of rice husk is rice husk ash (RHA) which is rich in silica (SiO2) contents. This paper focused on the effect of acid leaching treatment on rice husk to produce high-purity silica. There are 4 different states of conditions involved; raw rice husk (RRH), treated rice husk (TRH), rice husk ash (RHA), and treated rice husk ash (TRHA). Citric acid; C6H8O7 was used as a leaching agent. TRH and TRHA was leached to see whether treated rice husk before combustion (TRH) or treated rice husk after combustion (TRHA) will produce more high-purity silica. Chemical composition analysis shows high amorphous silica content which is 98.47% with low metallic impurities at 1.0M C6H8O7, 70 oC for treated rice husk (TRH). X-ray diffraction (XRD) pattern shows the presence of amorphous silica in treated rice husk (TRH) and crystalline silica in treated rice husk ash (TRHA). Fragmentation of TRH into small pieces after acid leaching is seen where there is significant increase in the exposed surface areas. High-purity amorphous silica with more than 98% was prepared via citric acid leaching treatment and combustion process.

Mechanoactivation Of Rice Husk Ash In Laboratory Conditions

2019 ◽  
pp. 20-26
Keyword(s):  
Mechanical Activation ◽  
Rice Husk ◽  
Amorphous Silica ◽  
Silicon Oxide ◽  
Rice Husk Ash ◽  
Pozzolanic Activity ◽  
Maximum Solubility ◽  
Laboratory Conditions ◽  
Before And After ◽  
Mineral Additive

In many rice producing countries of the world, including in Vietnam, various research aimed at using rice husk ash (RHA) as a finely dispersed active mineral additive in cements, concrete and mortars are being conducted. The effect of the duration of the mechanoactivation of the RHA, produced under laboratory conditions in Vietnam, on its pozzolanic activity were investigated in this study. The composition of ash was investigated by laser granulometry and the values of indicators characterizing the dispersion of its particles before and after mechanical activation were established. The content of soluble amorphous silicon oxide in rice husk ash samples was determined by photocolorimetric analysis. The pizzolanic activity of the RHA, fly ash and the silica fume was also compared according to the method of absorption of the solution of the active mineral additive. It is established that the duration of the mechanical activation of rice husk ash by grinding in a vibratory mill is optimal for increasing its pozzolanic activity, since it simultaneously results in the production of the most dispersed ash particles with the highest specific surface area and maximum solubility of the amorphous silica contained in it. Longer grinding does not lead to further reduction in the size of ash particles, which can be explained by their aggregation, and also reduces the solubility of amorphous silica in an aqueous alkaline medium.

scholarly journals Optimization of nanostructured/nano sized rice husk ash preparation

2020 ◽  
Vol 17 (3(Suppl.)) ◽  
pp. 0953
Author(s):  
Medhat Mostafa ◽  
Hamdy Salah ◽  
Amro B. Saddek ◽  
Nabila Shehata
Keyword(s):  
Particle Size ◽  
Rice Husk ◽  
Amorphous Silica ◽  
Particle Shape ◽  
Rice Husk Ash ◽  
Loss On Ignition ◽  
Shape Distribution ◽  
Disk Mill ◽  
Grinding Time

The objective of the study is developing a procedure for production and characterization of rice husk ash (RHA). The effects of rice husk (RH) amount, burning/cooling conditions combined with stirring on producing of RHA with amorphous silica, highest SiO2, lowest loss on ignition (LOI), uniform particle shape distribution and nano structured size have been studied. It is concluded that the best amount is 20 g RH in 125 ml evaporating dish Porcelain with burning for 2 h at temperature 700 °C combined with cooling three times during burning to produce RHA with amorphous silica, SiO2 90.78% and LOI 1.73%. On the other hand, cooling and stirring times affect the variation of nano structured size and particle shape distribution. However, no crystalline phases were found in RHA in all cases. Results proved that the Attritor ball mill was more suitable than vibration disk mill for pulverizing nano structured RHA with 50% of particle size (D50) lower than 45 mm and 99 % of particle size (D99) lower than 144 mm to nanosized RHA with D50 lower than 36 nm and D99 lower than 57 nm by grinding time 8.16 min to every 1 g RHA without changes in morphousity of silica.

scholarly journals Production of Ultra-Fine Grained Aluminum Alloy using Friction Stir Process

2003 ◽  
Vol 44 (7) ◽  
pp. 1343-1350 ◽  
Author(s):  
Yong-Jai Kwon ◽  
Ichinori Shigematsu ◽  
Naobumi Saito
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Process ◽  
Friction Stir ◽  
Fine Grained

scholarly journals Dry sliding wear behavior of AA6061 aluminum alloy composites reinforced rice husk ash particulates produced using compocasting

2017 ◽  
Vol 5 (2) ◽  
pp. 127-135 ◽  
Author(s):  
J. Allwyn Kingsly Gladston ◽  
I. Dinaharan ◽  
N. Mohamed Sheriff ◽  
J. David Raja Selvam
Keyword(s):  
Aluminum Alloy ◽  
Rice Husk ◽  
Sliding Wear ◽  
Rice Husk Ash ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding
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