Bruker QUANTAX EDS User Manual

5.20 Phase Analysis QUANTAX EDS
109
5.20
Phase Analysis
The AutoPhase tool calculates images that reveal the local distribution of different phases in a
sample.
Step
Example/hints
1
Select
the workspace and
acquire a map or open a bcf.
or rtm. file.
Refer to section 5.17. Phase analyses can be
performed on qualitative and quantitative
maps.
2
Select the
Map
tab and the elements of
interest for phas
e calculation in the
thumbnail bar
.
Select elements by ticking the boxes below
the individual element images in the
thumbnail bar. Only selected elements will be
used for phase calculation.
3
Select the Phases tab.
4
Use
on the
button to open t
he corresponding menu
and activate
Automatic update option.
Automatic update is useful when
experimenting with methods and parameters.
T
he phase image will update after every
change.
5
C
lick .
Phases will be calculated and appear in the
thumbnail bar.
6
Use on the AutoPhase settings sub-
menu to open it.
Set parameters for phase determination.
7
Select the AutoPhase Method
All three AutoPhase methods work based on
the number of element
maps chosen.
Neighboring p
ixels containing the same
chemic
al information represent a particular
phase. Depending on the chosen sensitivity,
pixel
s with similar composition get merged
into one phase.
i. PCA
PCA (Principal Component Analysis) is a
specific type of vector analysis reducing the
dataset to the most r
elevant chemical
information. It starts its operation with an n
-
dimensional “element” space. The intensity
of every element selected in the map
thumbnail bar (below the left
-hand side Map
tab) spans
one axis of this space. Map pixels
that contain the same
chemical information
form data clouds which are separated by the
PCA dimension reduction algorithm.
ii. Clusters
The Cluster method compares the
composition of neighboring pixels (by running
through the map pixel by pixel).
iii. Objects.
The phases are user-defined by manually
d
efining objects using drawing tools
accessible through the icon.
8
Select and adjust the Options for the
phase calculation
Use the sliders to change the values.

Bruker QUANTAX EDS Specifications

General

Brand	Bruker
Model	QUANTAX EDS
Category	Laboratory Equipment
Language	English