In June I had a two-week research internship at the Wroclaw University of Technology. On the internship I was testing a new alkaline texturing solution based on digestion with KOH and dihydric alcohols. In July, I attended a conference Junior Euromat addressed to students and young researchers. At the conference, I had the opportunity to see the latest developments in the field of materials science.

Theoretical description of viscosity of liquids in terms of pseudopotencial approach and no-equilibrium molecular dynamics. Definition of viscosity based on theory free atom.

In July I continue potentiostatic deposition of Zn-Mo layers from the following citrate solutions :
1) 0,65 M Na3HCit + 0,16 M ZnSO4 + 0,24 M Na2MoO4 + 0,1 g PEG +0,01 g SDS; pH=5
2) 0,45 M Na3HCit + 0,16 M ZnSO4 + 0,24 M Na2MoO4 + 0,1 g PEG +0,01 g SDS; pH=5
3) 0,45 M Na3HCit + 0,16 M ZnSO4 + 0,24 M Na2MoO4; pH=5
4) 0,25 M Na3HCit + 0,16 M ZnSO4 + 0,24 M Na2MoO4 + 0,1 g PEG +0,01 g SDS; pH=5
5) 0,25 M Na3HCit + 0,16 M ZnSO4 + 0,24 M Na2MoO4; pH=5
6) 0,25 M Na3HCit + 0,16 M ZnSO4 + 0,08 M Na2MoO4 + 0,1 g PEG +0,01 g SDS; pH=5
7) 0,25 M Na3HCit + 0,16 M ZnSO4 + 0,04 M Na2MoO4 + 0,1 g PEG +0,01 g SDS; pH=5
8) 0,25 M Na3HCit + 0,16 M ZnSO4 + 0,02 M Na2MoO4 + 0,1 g PEG +0,01 g SDS; pH=5
9) 0,25 M Na3HCit + 0,16 M ZnSO4 + 0,1 g PEG +0,01 g SDS; pH=5
10) 0,25 M Na3HCit + 0,08 M SnSO4 + 0,1 g PEG +0,01 g SDS; pH=5
11) 0,25 M Na3HCit + 0,16 M ZnSO4 + 0,04 M SnSO4 + 0,1 g PEG +0,01 g SDS; pH=5
12) 0,25 M Na3HCit + 0,16 M ZnSO4 + 0,08 M SnSO4 + 0,1 g PEG +0,01 g SDS; pH=5
13) 0,25 M Na3HCit + 0,16 M ZnSO4 + 0,08 M SnSO4; pH=5
14) 0,25 M Na3HCit + 0,08 M ZnSO4 + 0,16 M SnSO4 + 0,1 g PEG +0,01 g SDS; pH=5
with the following parameters:
-potential of a working electrode:
E1= -1,2 V
E2= -1,25 V
E3= -1,3 V
E4= -1,35 V
E5= -1,4 V
E6= -1,45 V
E7= -1,5 V
E8= -1,6 V
E9= -1,7 V
E10= -1,8 V
E11= -1,9 V
E12= -2,0 V
E14= -2,2 V vs.SCE
-rotating disc electrode speed:
ω1= 16 rad/s
ω2= 40 rad/s
ω3= 68 rad/s
-charge:
Q1= 25 C
Q2= 50 C
Q3= 100 C
Q4= 150 C
Q5= 250 C
Next the chemical composition of electrodeposits were characterised by the Wavelength Dispersive X-ray Fluorescence method (WDXRF), and the Glow Discharge Optical Emission Spectroscopy method (GDOES). Next I prepare, among others, partial polarizaion curves for the Zn, Mo ,H co-discharge.

Main activities and studies carried out during July:

- Preparing samples for microharness measurements
- Microhardenss measurements
- Samples investigations with Cu using TEM
- Tensile tests for ternary alloy and alloy with Mo addition
- Writing an abstract for the 9-th Polish-Japanese Joint Seminar on Micro and Nano Analysis

During last month I was investigating the influence of high energy ball milling on a morphology and mechanical properties of a 7475 aluminium alloy powder and AA7475/AlN composite powders in order to determine an optimal milling time for each composition. To achieve that I decided to investigate milled powders after 10, 20, 30, 40 and 50 hours of ball milling using optical microscopy, x-ray difractometry and microhardness tests.
I also made an attempt to mill my powders with liquid nitrogen addition.