Synthesis of Alumina Fibre by Annealing Method Using Coir Fibre

Evolution of Thermo-mechanical Properties of Aluminium-Silicon Alloy (Al-1wt%Si)

“…The elongations were measured by a dial gauge to an accuracy of ± 10 -5 m. The yield stress, σ y is considered to be the stress corresponding to the first significant deviation from linearity in the starting part of the stress -strain curve. For the Figure 1 (a-d), the maximum stress applied to the sample before fracture was taken as the fracture stress σ f [10][11][12][13][14][15][16][17]. The microstructure of the alloy (Al-1wt% Si) was investigated by using an electron microscope, JEOL (1973 model JEM-100C) [15][16][17][18] working at an accelerating voltages 100 kV.…”

“…In the 60 Co gamma rays cell used, the dose rate was 1.58 KGy/min. Some other relevant information was given in references [15][16][17][18] for data samples preparations.…”

“…The final polish was carried out using commercial slurry (Struers OP-U). The samples were observed under a JEOL (1973 model JEM-100C) [15][16][17][18] by using magnifications between X100 and X5000. The qualitative and quantitative assessments of the chemical compositions of the sample of the alloy (Al-1wt%Si) were done with the Energy Dispersive Spectrometer (EDS) method.…”

“…The nucleation of precipitates in the alloys (Al-Si) was improved by pre-aging quenched specimens approx at the room temperature [15][16][17][18]. This enrichment can be attributed to dislocation loops formed by condensation of quenched -in vacancies.…”

Some Features of Doping of Nano–Graphite in Natural Coir Fibre Epoxy Composites

“…This analysis was used to produce the effective fibre surface area which leads to increase the fibre-matrix adhesion [5-11 and also references therein], and also in FRCs good fibre-matrix adhesion is a requirement for good mechanical properties. The chemical treatment removes significant amounts of hemi-cellulose and pectin from the coir fibres leading to increased thermal stability [5][6][7][8][9][10][11]13]. The treatment was done by soaking the coir fibres in the solution of 1N 10-20% NaOH salt for 3-5 hours followed by thorough washing in distilled water and drying.…”