Computer simulation of hydrogen embrittlement in metals
Article Abstract:
The effects of different concentrations of hydrogen on the elastic response and mechanical stability of palladium to uniaxial tensile stress at different temperatures were studied using the Parrinello-Rahman MD method. The results showed that introduction of hydrogen induced embrittlement through a local enhancement of ductility in hydrogen-saturated regions of the metal. The results agree with predictions of the hydrogen-enhanced local plasticity mechanism of fracture, but do not conform with the decohesion model.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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Formation of long-lived gas-phase antiprotonic helium atoms and quenching by H2
Article Abstract:
Metastable antiprotonic atoms were observed to endure for several microseconds in gaseous helium. Although the metastability of antiprotons in liquid helium had been previously verified, this is the first evidence that the particles are equally long-lasting in gas-phase helium. Furthermore, this metastability was terminated abruptly and completely by introducing hydrogen gas in minute quantities.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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Enzymatic production of biohydrogen
Article Abstract:
Issues concerning the amount of energy which it is possible to generate from cellulose are discussed. The differences in the yields of hydrogen from the oxidation of glucose and pentose are considered.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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