BINARY module allows binary (T-x)
phase diagrams (ie for systems with two components) to be calculated
and plotted at a fixed pressure. The user may carry out calculations
for a wide range of systems such as alloys, molten salts, slags
are normally initiated through
a special graphical user interface. As the calculations proceed
the diagram is plotted on the screen. Calculated
invariant temperatures are displayed in a box to the side of the
diagram. After the calculations have been completed portions of
the diagram may be labelled interactively. The results of the
calculations are stored in a form which allows replotting of the
whole or portions of the diagram. Stored experimental
data may be superimposed on the calculated diagram.
for the calculations are retrieved either from
specified databases or from a datafile prepared in advance. This
datafile would normally have been generated from the databases
by means of the ACCESS module. The databases will
on the installation; those that may be available include:
Recommended data for the elements
Scientific Group Thermodata Europe database
Scientific Group Thermodata Europe solution
NPL Database for salt systems
which may be added private or specialised databases
managed by individual users or groups.
can be produced in tabular or graphical forms
and sent both to the screen and to a file and hence to a printer.
module requires the specification of
either the names of the two components and a source database or
the name of the datafile containing the thermodynamic data for
the system. After fixing the pressure and range of temperatures and a
size for the calculations, a starting composition and temperature
is entered by manually positioning the graphics cursor and depressing
"F" or "f" to initiate the
Calculation and plotting of the phase diagram then proceeds
and the temperatures of any phase transitions found are written
in a box to the right of the diagram.
numerical results of the calculations
are stored in a file with an extension ".nbr". This
allows diagrams to be replotted with any available experimental
Brief summary of commands
DEFINE allows the user to name the datafile from which
the data are
to be retrieved or to define the system to be studied in terms
of the two components, in which case the data are retrieved from
a named database. The datafile must be in the MTDATA
format (file extension ".mpi") and should preferably
have been retrieved in advance by means of the ACCESS
LIST displays the current definition of the problem in
the status of the elements, components,
substances or phases present
(b) the pressure, temperature
temperature step interval for the calculations set by the user.
CLASSIFY allows the status of individual phases or
substances to be classified
as NORMAL (present) or ABSENT from the calculation. The number
of miscibility gaps potentially present may also be specified
if they are to be taken into account in the calculation.
SET allows the user to specify the pressure and also a
composition and temperature which can be used as an alternative
to the cursor, from which automatic calculation of the phase diagram
STEP allows the user to specify the start, finish and
step size for
temperature to be used for the calculations.
COMPUTE draws temperature and composition axes and
annotation on the
screen. If a starting temperature and composition have been specified
with the SET command, calculation of the phase
proceeds automatically. Otherwise the cursor appears and a starting
point within a two phase field may be selected manually. Depressing
"F" or "f" initiates the
computation and plotting of the binary phase diagram within the
range of temperatures specified in STEP
is sent simultaneously to the screen and a graphics file. Hard
copy output can be obtained by using the command LASER
which copies the contents of this file to your local plotting
REPLOT allows a diagram to be replotted from information
stored in a
binary results file (file extension ".nbr") created
during a previous phase diagram calculation. A selected area may
be chosen from the diagram for replotting by use of the ORDINATE
and ABSCISSA commands, or else the whole diagram
replotted. Experimental data or other annotation in a file may
allows the temperature range to be defined, used when replotting
the calculated binary phase diagram.
ABSCISSA allows the composition range to be defined, used
the calculated binary phase diagram.
LASER sends a copy of any diagrams plotted on the screen
to a local
plotting device if available.
RETURN takes the user out of BINARY
back to the module level.
runs a macro taken from a file. The name of the file should be
entered in quotes. Commands can also be passed through to the
operating system by prefixing them with a $ (dollar sign). The
dollar sign and operating system command should be entered within
introduction gentle introduction to using
the options available in BINARY contains annotated
examples, each directed towards achieving a particular outcome,
showing typical combination of commands which would be necessary
to achieve that end.
summary of the commands
available can also be used as an index to obtain more detailed
help about each command.
data can be overlayed onto calculated binary diagrams.