ISSN:
1436-5073
Schlagwort(e):
tungsten heavy alloys
;
embrittlement
;
trace impurities
;
SIMS
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract Embrittlement of tungsten heavy alloys is often caused by trace impurities. Heavy alloys containing O, Al and Si, respectively, were mechanically tested and exhibited interfacial embrittlement. SIMS analysis of metallographic sections was found to be a suitable tool for comparative analysis of heavy alloys with different fracture behaviour, the results obtained being not dependent on the fracture mode as is the case e.g. with AES. It was found that oxygen may cause embrittlement at the interfaces even at low overall content, since it is enriched at the phase boundaries tungsten-binder. Al is detrimental if it covers the interfaces rather evenly; grossly inhomogeneous distribution is less harmful. Generally, the distribution of trace elements is much more important than their total amount.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01242426
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