Azarbaijan Shahid Madani University

About: Azarbaijan Shahid Madani University is a education organization based out in Tabriz, Iran. It is known for research contribution in the topics: Graphene & Nanocomposite. The organization has 1477 authors who have published 3186 publications receiving 30278 citations. The organization is also known as: Azarbaijan University.

Production of Al6061 matrix composites with ZrO2 ceramic reinforcement using a low-cost stir casting technique: Microstructure, mechanical properties, and electrochemical behavior

Abstract: The Al6061/ZrO2 composites were produced using a low-cost stir casting technique, for the first time. The microstructures, mechanical properties, and electrochemical behavior of the composites, containing different amounts of ZrO2 ceramic reinforcement, were studied in detail. The results revealed that the weight percentage of ZrO2 ceramic reinforcement was the most effective parameter affecting the properties of composites. The optimum mechanical properties and corrosion resistance were achieved when adding 3 wt.% ZrO2 at 700 °C due to the uniform distribution of ceramic reinforcement, elimination of agglomeration, finer grain sizes, and no chemical reactions between the ZrO2 ceramic particles and Al matrix. The maximum elastic modulus of larger than 80 GPa, the maximum hardness of 1.39 GPa, and the highest wear resistance were obtained at optimum condition. From the viewpoint of electrochemical behavior, the optimal composite showed higher pitting resistance with the lowest thermodynamic tendency to corrosion because ZrO2 ceramic particles are less prone to corrosion. In addition, at a higher amount of ZrO2, the formation of a continuous protective layer on the surface is postponed, which leads to lower corrosion resistance.

Factors that influence the level of weed seed predation: A review

Abstract: Herbicides applied alone have failed to reduce weed populations in agricultural ecosystems. The use of this management strategy has followed other problems such as damage to ecosystems and organisms that live in it. Herbicide resistance in weeds has also occurred more quickly based on the application of herbicides. Today, most scientists are looking for new integrated weed management programs in agricultural ecosystems. Biological control is one of the most effective ways of weed management. In this way, living organisms are used to reduce and control weed species in arable lands. Weed seed predators, including predispersal and postdispersal predators as biological control agents, can be primary factors of weed seed mortality in agricultural ecosystems. This review has discussed factors influencing seed predator populations, activity, and granivory. Knowledge of the interrelations between factors and seed predators can contribute to designing future strategies that augment weed seed predator activity and enhance weed seed consumption as a component of an integrated weed management system.

Polyurethane/Nitrogen-Doped Graphene Quantum Dot (N-GQD) nanocomposites: synthesis, characterization, thermal, mechanical and shape memory properties

Abstract: A series of polyurethane-based nanocomposites with different contents of N-GQD nanoparticles were prepared via solution casting and in-situ polymerization methods. Hydrogen bonding content of carbo...