Hydrogen Absorption and Critical Point Lowering in Thin PdHx Films
The attractive hydrogen-hydrogen interaction which causes phase transitions in metalhydrides is of elastic origin1,2. Two hydrogen atoms embedded in a metal will see each other via their respective long-range displacement fields in the lattice. As the displacement field around a dilatation center falls off as 1/r2 the range of the perturbation in the lattice is infinite and the H-H interaction depends on the shape and the size of the sample. This has clearly been put in evidence by Zabel and Peis13. These authors showed that the spatial distribution of the segregated phases in cylindrically shaped Nb samples depended crucially on the ratio of the length to the radius of the samples.
KeywordsHydrogen Absorption Quartz Crystal Critical Pressure Quartz Substrate Dilatation Center
Unable to display preview. Download preview PDF.
- 1.G. Alefeld: Ber. Bunsenges. Phys. Chem. 76, 746 (1972)Google Scholar
- 3.H. Zabel, H. Peisl; Acta Metall. 28, 589 (1979)Google Scholar
- 8.Y. de Ribaupierre, F.D. Manchester; J. Phys. C 7, 2126 (1974), 8, 1339 (1975)Google Scholar
- 9.H. Frieske, E. Wicke; Ber. Bunsenges. Phys. Chem. 77, 50 (1973)Google Scholar
- 14.L.D. Landau, E.M. Lifshitz; Course of Theoretical Physics, vol. 5 Statistical Physics, Pergamon Press, Oxford (1980)Google Scholar
- 15.L.D. Landau, E.M. Lifshitz; Course of Theoretical Physics, vol. 7 Theory of elasticity, Pergamon Press, London (1959)Google Scholar
- 16.B.M. Geerken, R. Griessen, L.M. Huisman and E. Walker, to be published.Google Scholar