Báo cáo vật lý: "FABRICATION OF LOW COST OF ALUMINIUM MATRIX COMPOSITE REINFORCED WITH SILICA SAND" potx

... hardness of aluminium composites decreases. Also, it is noted that the hardness of aluminium matrix composites reinforced with silica sand is higher than those reinforced with commercial silica. ... the higher sintered density accomplished in aluminium matrix composite reinforced with silica sand. Fabrication of Low Cost of Aluminium Matrix Com...

Ngày tải lên: 07/08/2014, 14:20

... strength of the E/GF composites with the addition of silane- treated OMMT. According to Lin et al., 5 the clays were dispersed between both the bundles of GF and within the interstices of the ... effects of silane-treated OMMT loading on the flexural modulus of E/GF composites are presented in Figure 2. The incorporation of silane-treated OMMT increases the stiffness of...

Ngày tải lên: 07/08/2014, 14:20

... measurements of the shell butyl acrylate shell, the range of concentrations of butyl acrylate was 9.9%–12.6%, that of SLS was 0.1–0.4 CMC, and that of APS was 0.01%–0.04%. 2.3 Determination of Solid ... polymerisation rate of the styrene core, and k is the rate reaction constant in the formation of the styrene core. 3.4 Mechanism of Reaction in the Formation of the...

Ngày tải lên: 07/08/2014, 14:20

... of more water promotes higher mobility of the whole system and made the recrystallization process appeared at lower temperature. The enthalpy of exotherm of 1:2 system was higher compared with ... and narrow exotherms at lower peak temperatures (85 o C–100 o C) which became smaller with lower cooling rate. These observations suggest the presence of two types of amylose-lip...

Ngày tải lên: 07/08/2014, 14:20

... case of increasing precursor concentration, it was found that the formation of Co nanoparticles was very slow at low concentrations of Co chloride (< 30 mM) even with a large amount of N 2 H 4 ... formation of Ni-Ag core-shell nanoparticles by first generating Ni nanoparticles through the reduction of Ni 2+ with N 2 H 4 and followed by coating of the as-prepared N...

Ngày tải lên: 07/08/2014, 14:20

... flask. 2.3 Determination of Degree of Hydrolysis (Conversion) and Rate of Hydrolysis The degree of hydrolysis was determined by titration of the oil phase samples with 0.1 M sodium hydroxide ... The degree of hydrolysis, X is calculated as below: (ml NaOH used) (molarity of NaOH) (average molecular weight of fatty acid) ,% = 10 (weight of sample) X (1) T...

Ngày tải lên: 07/08/2014, 14:20

... important factors that determine the importance of dehulling due to its low content of oil. So, the importance of dehulling should decrease with the decreases of the hull percentage. Oil content (35.5%) ... growth of the importance of oilseeds in the national economy of Sudan, the high demand to look for a new source of oil and the sufficient availability of this plan...

Ngày tải lên: 07/08/2014, 14:20

... pressed with a cylindrical mould with a diameter of 16 mm under a pressure of 150 MPa to yield samples in pellet form. The specimens were sintered at various temperatures in the range of 1200 o C ... GHz as a function of sintering temperature with different compositions. The sample with composition MBNT4 showed the highest dielectric constant in the range of 75 to 85 wi...

Ngày tải lên: 07/08/2014, 14:20

... fractions of 1-alkanol, as well as with temperature. However, the value of viscosity increased with increasing concentrations of 1- alkanols and decreased with increasing temperature. As the number of ... subsequent formation of (new) H-bonds [C=O … H–O] between the proton acceptor oxygen atom (with lone pair of electrons) of the C=O group of DMF and the proton of...

Ngày tải lên: 07/08/2014, 14:20

... program with a lattice of Bi 3 NbO 7 reported by Ling and Johnson as starting values. 11 All of the peaks in the XRD patterns of these materials can be fully indexed in a tetragonal system with ... for all of the samples of Bi x NbO δ (2.5 ≤ x ≤ 6). The Arrhenius plot of YSZ is included for comparison purposes. 15 In general, at 300 o C, the conductivity decreased in or...

Ngày tải lên: 07/08/2014, 14:20