Writing in progress…
Last month’s theme: RESULTS
Tons of graphs, images, schemes to prepare and describe.

This month I've started analyzing the data from EBSD measurements which involved preparing maps charts, textures and pole figures from crystallographic data. Unfortunately after consultations with colleagues from AGH it seems that much of obtained microstructural data is strongly affected by sample preparation, therefore big part of investigations will have to be repeated. Apparently fine crystals that are appearing in microstructure are effects of recrystallization that happens after mechanical preparation of zinc surface. Zinc in low temperatures deforms easily by twinning, after the deformation twin boundaries becomes nucleation sites during crystallization which in zinc can occur in room temperature. This process can take place during the preparation thus (deformation during cutting and grinding and recrystallization before surface is polisched sufficiently to observe microstructure) it is difficult to determine wether observed microstructure is real or just result of aggressive preparation.

Currently I'm writing my PhD thesis.
In march I've worked on the following chapters:
- Galvanic coatings for corrosion protection
- Zinc based coatings for corrosion protection of steel
- Methods of production of metal and alloy coatings
- Electrochemical deposition of metal and alloy coatings
- Stages of electrodeposition process
- Electrocrystallization
- Conditions for alloy formation
- Classification of alloy electrodeposition processes

The compression tests were conducted February easily deformable AZ31 alloy rod together with acoustic emission measurement . A rod having a diameter of 3 mm was cut into pieces, then z&#322;&#261;czono them together and sanded to a height of 5 mm. However, because of departures from perpendicularity of the axis of the samples , Scrub yet each separately. The samples were used for investigation of the axial compression deformation . Texture samples was clearly weaker than previous extruded products with an AZ31 , which in combination with the grain uniformity and sphericity explains their increased ductility. Although the texture was lower , still may be considered that the extrusion is a texture characterized by the arrangement of the base planes (0002 ) parallel to the extrusion direction. Its main component was the orientation of the type ( 0002) < 10-10 > . Compression along axis conducive to the formation of twins stretching , at least in the initial stage of crushing . Samples were subjected to ever greater strain with simultaneous measurements of acoustic emission . For this purpose, specially modified to carry out the compression position , respectively, by adding milled and polished sample and the gasket plate of the testing machine . Nine studies were conducted on samples of alloy AZ31 cylindrical shape with the following parameters : the upper surface of the sample - 7.5 mm ², the deformation speed - 0.1 mm / min , room temperature , the maximum stress of about 400 MPa. Traverse testing machine was controlled deformation (constant strain rate ) . Taken three measurements of the total destruction of the sample, which followed the crossing force of 3 kN and a series of measurements involving reaching the point of strength, and then change the sign of strain rate on the opposite . In this way, six samples were deformed before total destruction strength 0.7 , 0.8 , 1.0 , 1.3, 1.8 , 2.4 kN. In the case of acoustic research , for comparative purposes , it was necessary to carry out the calibration measurement on the sleeve of carbon steel. The value of the resultant force ( 90kN ) ensures the resilient nature of the deformation of steel, therefore, to exclude possible errors of interpretation akustogramów magnesium alloys , e.g. due to friction. Examined the nature of the compression curves and comparing them with akustogramami for magnesium alloys and a small change in the dimensions of the sample shows that the deformation took place , and the large peaks in the akustogramach suggest twinning as the main deformation mechanism .

In case of Layer by Layer method of silver nanoparticles deposition, druring last month I confinred the deoposition condition.
As preliminary cleaning and activation of the polished silicon substrates the mixture of sulfuric acid and hydrogen peryoxide (2:1 vol.) was used.
Polyelectrolyte solution was 500ppm PAH solution. Variuos ionic strength of solution were tested. (1e-4, 1e-3,1e-2 and 0,15M addjusted with sodium chloride)
The highest ionic strength resulted in highest nanopartices concetration.
Also comparison beteewn PAH and PLL were performed. The test indicated that PAH is a better choice.

My work with simulation software were concentrated on modiffication of the model and the script code which enables me in the future investigation of absorption enhancement in silicon with metalic nanoparticles.