Die chemische Zusammensetzung der Oberflache von Materia lien, die aus zwei oder mehr Komponenten bestehen, wird sehr oft durch den Einfluss der Primarelektronen sowie durch das Zerstau ben, wie es zur Reinigung der Probenoberflache, bzw. zur Aufnahme von Tiefenprofilen verwendet wird, drastisch verandert. In einer quantitativen Beschreibung der Oberflachenzusammensetzung mus sen daher die verschiedenen Effekte, die durch die primaren Elek tronen oder Ionen hervorgerufen werden, grundsatzlich berucksich tigt werden. Entsprechend der Verschiedenartigkeit der auftreten den Effekte scheint es...

Chemical Shift in the Investigation of Compounds with the Microprobe Changes in the X-ray spectra of Ti, Hf, and Ta as a function of their bonding to B were investigated. Lines of the K-, L-, and M-series were measured. Since only the lines of highest intensity are observed in heat excitation, only an indirect dependence on the binding is demonstrable. For this reason, the values observed were interpreted as being due to the overlapping of the outer energy bands in chemical compounds. Literatur 1 H. Kunst, Harterei-Techn. Mitt. 28, 105 (1073). 2 K. Sage , Tabellen zur Rontgen-Emissions-und...

Investigative Methods for Determining Phases in High Speed Steels Both carbide studies and matrix studies were carried out for X-ray phase determination on the high speed steel S 6-5-2. The carbide phase was isolated chemically, the isolate yield being 10.5% by weight. The isolate was analysed and its phases investigated X-radiographically. The X-ray diagram showed that M6C carbide is to be considered the main constituent of the carbide. VC is present in small amounts. The two types of carbide in the cut surface could be distinguished metallographically by a potentiostatic etching procedure....

The 11th Colloquium on Metallurgical Analysis - a joint venture of the Institute of Analytical Chemistry of the Technical University in Vienna, the Austrian Society for Analytical Chemistry and Microchemistry, the German Metals Society (DGM), and the Society of German Iron and Steel Engineers (VDEh) - was attended by 120 scientists from 12 nations. The major topics covered were surface, micro and trace analysis of materials with a heavy emphasis on metals. According to the strategy of the meeting attention was focussed on an interdisciplinary approach to materials science - combining...