In this issue Dear Customers and Users... Gunnar Eriksson turns 65

Issue 54 February 6, 2007
In this issue
• Dear Customers and Users...
• Gunnar Eriksson turns 65
• GTT-Technologies’ Annual Workshop, Herzogenrath, Germany, June 2007
• Further Upcoming Events
• Critical Thermodynamic Evaluation of Oxide Systems Relevant to Fuel Ashes and Slags, Part 1
• New SGTE Case Book Edition to be Published this Summer
• A description of the 3D Phase Diagrams Software Project
• GTT’s Longer Term Projects
• Visitors
• News from the F*A*C*T Group, CRCT
Dear Customers and Users...
... we hope that you all have had a good start into the New Year 2007. We would like to take this opportunity
to thank you all for the support you have given us for our work last year and to assure you that we will also be
eager to serve your needs in 2007.
Gunnar Eriksson turns 65
On February 7, 2007, Gunnar Eriksson will celebrate his 65th birthday. We wish him all the best on this
special event and would like to express our gratitude for all the good work he has done for GTT which has
become the backbone of the company over the years.
Since he will be, as usual during this time of the year, in Montreal for that day, we would like to thank our
Canadian colleagues for organising a big birthday party for him. "Of course", he says, "this birthday is nothing
special", and there is no end to the professional activities in and around the Gibbs energy minimiser. In other
words: Dr. Solgas will be with us for many working years to come. We wish him Good Health and All the
Best!
1

Issue 54 GTT-News February 6, 2007
GTT-Technologies’ Annual Workshop, Herzogenrath, Germany, June
2007
For week 25, i.e. between June 18 and 22, we are planning to host our 2007 Annual Workshop, please note
the dates in your calendars.
We have already contacted several interesting speakers for the session on user applications, for example Surendra
Saxena, University of Florida, on geo-chemical applications; Alexander Pisch, INP Grenoble, on salt
systems; Torsten Markus, Research Center Jülich, on lamp chemistry; Helge Moog, GRS Braunschweig, on
modelling salt stock behaviour; Risto Pajarre, VTT Helsinki, on advanced modelling of surface tension of
liquids; Morihisa Yokota, UBE Industries, on cement making and aluminium casting; Pawel Drozdz of the
Faculty of Metals Engineering and Industrial Computer Science at AGH University of Science and Technology
in Krakow; and some colleagues of the RWTH Aachen University on steel making and non-ferrous
metallurgy. Furthermore, together with our colleagues of the Department of Ferrous Metallurgy as well as the
Virtual Reality Center at RWTH Aachen University we will give a demonstration of the advanced version of
our 3D phase diagram software.
If you would like to contribute a short talk to the "user presentations" part of the workshop, please feel free to
contact us. We will provide details on the workshop in a future edition of our newsletter.
Further Upcoming Events
• Workshop on Computational Thermochemistry in Istanbul, Turkey, April 27, 2007
We are currently in the planning stages for a one-day workshop on computational thermochemistry
in co-operation with our new partner in Turkey. Dr. Bora Derin, who is with the Metallurgical and
Materials Engineering Department at Istanbul Technical University 1 , has started the organisational work
for a meeting on Friday, April 27, 2007.
• German-Sino Symposium on "Computational Thermodynamics and Kinetics and their Applications to
Solidification", Xi’an, China, June 1 - 4, 2007
GTT has accepted an invitation to participate in the first German-Sino Symposium on "Computational
Thermodynamics and Kinetics and their Applications to Solidification" in Xi’an, China, June 1 - 4,
2007
• European Metallurgical Conference 2007, Düsseldorf, Germany, June 11 - 14, 2007
GTT has also accepted the invitation to organise a session on computer modelling of metallurgical
processes at the European Metallurgical Conference EMC 2007 2 , June 11 - 14, 2007, in Düsseldorf,
Germany.
• DGM Fortbildungseminar "Computerunterstützte Thermodynamik", Maria Laach, Germany, June 25 -
27, 2007
GTT will participate in the annual course on "Computerunterstützte Thermodynamik" 3 which is held
by DGM (Deutsche Gesellschaft für Materialkunde) in June in Maria Laach.
• RWTH Aachen University
1 http://www.mme.itu.edu.tr/
2 http://www.emc.gdmb.de/
3 http://www.dgm.de/fortbildung/?tgnr=805
© 2007, GTT-Technologies 2 info@gtt-technologies.de

Issue 54 GTT-News February 6, 2007
In the framework of his teaching appointment at RWTH Aachen University Klaus Hack will run two
courses in the coming months, one on March 1 - 2, 2007, and the other on April 12 - 13, 2007. A further
course will be held at the Technical University of Ilmenau, Thüringen, on March 19 and 20, 2007.
Critical Thermodynamic Evaluation of Oxide Systems Relevant to
Fuel Ashes and Slags, Part 1
In co-operation with the Institute of Energy Research 4 (IEF-2) at the Research Centre Jülich we habe published
a multi-part article on the critical thermodynamic evaluation of oxide systems relevant to fuel ashes and slags.
Here is the information on Part 1:
Critical thermodynamic evaluation of oxide systems relevant to fuel ashes and slags. Part 1: Alkali oxidesilica
systems, by E. Yazhenskikh, K. Hack, and M. Müller, CALPHAD Volume 30, Issue 3, 2006, pp. 270-
276
Abstract
The associate species model was applied to the thermodynamic representation of the liquid in oxide systems
Na2O-SiO2 and K2O-SiO2. The available phase diagram and activity data were collected and evaluated for the
purpose of improving the solution database. These new data for the liquid phase are compatible with data for
the solid stoichiometric compounds from the FACT Pure Substance database. The phase equilibria calculated
using the new optimised solution data show good agreement with the experimental points. Furthermore,
the experimental activities are well reproduced. In contrast to other databases the new dataset allows the
description of the whole composition range including the region near the pure alkali oxides.
New SGTE Case Book Edition to be Published this Summer
As editor in-chief and main author Klaus Hack has handed over the second enhanced edition of the SGTE
Case Book - Thermodynamics at Work 5 to the publisher. Woodhead is planning to bring the book on the
market later this year. We will keep you informed.
A description of the 3D Phase Diagrams Software Project
A description of the 3D phase diagrams software mentioned above that GTT, the Department of Ferrous Metallurgy
6 as well as the Virtual Reality Group 7 at RWTH Aachen University are jointly developing, is described
in the article "Space Phase - Visualisierung von Phasendiagrammen in multi-komponentigen Systemen" (in
German). The article has been published in the Jahresbericht (annual report) 2005/2006 of the Virtual Reality
Center. Both the article and the entire annual report are available for download 8 .
Here in the abstract in English:
4
http://www.fz-juelich.de/iwv/iwv2/
5
http://www.woodheadpublishing.com/en/book.aspx?bookID=1283
6
http://www.iehk.rwth-aachen.de/
7
http://www.rz.rwth-aachen.de/vr/
8
http://www.vrca.rwth-aachen.de/jabe/2006/
© 2007, GTT-Technologies 3 info@gtt-technologies.de

Issue 54 GTT-News February 6, 2007
This work shows the potential of three-dimensional diagrams, using modern computer graphics. Different
from the past perspective diagrams can now be generated from quantitative calculations of phase equilibria
for systems with arbitrary components. These diagrams can even be quantitatively readable. Furthermore new
visualisation techniques from the field of virtual reality (VR) are used to increase the comprehension of the
complicated data.
GTT’s Longer Term Projects
GTT has been granted project financing on two longer term projects, one on the modelling of microstructures
of Al-based alloys during heat treatment, and the other on the thermochemistry of substrate-YBaCu-high
temperature superconductors interactions.
GTT is also involved in a project to link the WinCast code for simulation of casting processes with our thermochemistry
library ChemApp 9 . This project is carried out in collaboration with the producers of WinCast,
RWP GmbH 10 , and the University of Mondragon 11 , Spain.
Visitors
We would like to thank our recent visitor Masanori Suzuki from Osaka University and Professor Toshihiro
Tanaka for the good work which we were able to do on data assessment for alloys under high pressure. We
hope to be able to continue the fruitful co-operation in this field.
News from the F*A*C*T Group, CRCT
Our partners at the CRCT 12 have released their latest newsletter. For the latest news from the CRCT please
consult the F*A*C*T News web pages. Please note the date for this year’s F*A*C*T Workshop and Conference:
May 14 to 16, 2007.
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GTT-News, Editor: Stephan Petersen
c○2007, GTT-Technologies, Fax: +49-2407-59661
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info@gtt-technologies.de
http://www.gtt-technologies.de
9 http://www.gtt-technologies.de/chemapp
10 http://www.rwp-simtec.de/
11 http://www.mondragon.edu/
12 http://www.crct.polymtl.ca/
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© 2007, GTT-Technologies 4 info@gtt-technologies.de