Tarbiat Modares University
Materials Science and Engineering
Commercial titanium sheets pre-coated with 300-mm thick graphite layer were treated by employing a pulsed Nd:YAG laser in order to enhance surface properties such as wear and erosion resistance. Laser insitu alloying method produced a... more
An alumina–15 wt.% zirconia (3 mol% yttria) nanopowder was synthesized by sol–gel method using salt and alkoxide as precursors. Al(NO3)39H2O, ZrOCl28H2O and Y(NO3)36H2O were used as salt precursors and Al(OC4H9)3 and Zr(OC4H9)4 were... more
The alumina nanopowder was synthesized via the sol–gel method. u-Alumina with crystallite size in the range of 25–110 nm was crystallized by calcination of the powder at 900 8C for 1 h. Sodium alginate, a natural innoxious polymer, was... more
The alumina–zirconia–yttria (AZY) nanopowders ranging from 30–110nm were synthesized via the sol–gel method. -Alumina and t-zirconia phases were identified in the nanopowders calcined at 900 ◦C for 1 h. Sodium alginate was used for... more
Al2O3–ZrO2 (Y2O3) nanopowders containing 5, 10 and 15 wt% ZrO2 were synthesized by aqueous sol–gel method using aluminum sec-butoxide and zirconium butoxide as precursors. BET analysis shows that, increasing the zirconia content results... more
Background: One of the major sources of drinking water contamination is nitrate. Nitrate concentrations of more than the standard levels (45mgl-1 based on nitrate) could cause methemoglobinemia in children. The aim of this study is to... more
Microwave processing eliminates the need for spending energy to heat the walls of furnace or reactors, their massive components and heat carriers. Hence, the use of microwave processing methods significantly reduces energy consumption,... more
- by Uanas Sadin
Tensile and wear properties of a nanostructured matrix of Al prepared via mechanical milling and hot extrusion were investigated before and after incorporation of B4C nanoparticles. Nanocomposite samples were prepared using mechanical... more
- by ali alizadeh
The Li 2 ZnTi 3 O 8 ceramics were prepared using conventional solid state method and then annealed at various temperatures, from 900°C to 1075°C for 4 h. The special effects of annealing treatment on microwave dielectric properties, phase... more
The Li 2 ZnTi 3 O 8 ceramics were prepared using conventional solid state method and then annealed at various temperatures, from 900°C to 1075°C for 4 h. The special effects of annealing treatment on microwave dielectric properties, phase... more
The effects of Al addition on pressureless-sintering of B 4 C-TiB 2 composites were studied. Different amounts of Al from 0% to 5 wt.% were added to B 4 C-TiB 2 mixtures (containing up to 30 wt.% TiB 2 ) and the samples were pressureless... more
In this research, electrical conductivity, thermal conductivity and mechanical properties of the Al-TiC composites which were sintered via microwave-assisted process were investigated. The specimens were sintered for 3, 5 and 8 minutes.... more
In the present paper, ZrB 2-HfB 2 composite was produced by pressureless sintering method and SiC, MoSi 2 and B 4 C particles were used as additive. In order to produce composite samples, ZrB 2 powder was first milled for 2 hours and then... more
In the present paper, ZrB 2 -HfB 2 composite was developed via a pressureless sintering method and SiC, MoSi 2 and B 4 C powders were used as additives. In order to produce composite samples, ZrB 2 is first milled for 2 h, afterwards the... more