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Volumn 277, Issue 5327, 1997, Pages 788-789

Surface energies and thermodynamic phase stability in nanocrystalline aluminas

Author keywords

[No Author keywords available]

Indexed keywords

ALUMINUM OXIDE;

EID: 0030879486     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.277.5327.788     Document Type: Article
Times cited : (859)

References (30)
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    • For reviews, see H. Gleiter, Nanostruct. Mater. 6, 3 (1995); R. W. Siegel, ibid. 4, 121 (1994); H. Gleiter, Prog. Mater. Sci. 33, 223 (1989); R. Freer, Ed., Nanoceramics (British Ceramic Proceedings 51, Institute of Materials, London, 1993); R. W Siegel, MRS Bull. 5, 60 (1990).
    • (1995) Nanostruct. Mater. , vol.6 , pp. 3
    • Gleiter, H.1
  • 2
    • 1542510357 scopus 로고
    • For reviews, see H. Gleiter, Nanostruct. Mater. 6, 3 (1995); R. W. Siegel, ibid. 4, 121 (1994); H. Gleiter, Prog. Mater. Sci. 33, 223 (1989); R. Freer, Ed., Nanoceramics (British Ceramic Proceedings 51, Institute of Materials, London, 1993); R. W Siegel, MRS Bull. 5, 60 (1990).
    • (1994) Nanostruct. Mater. , vol.4 , pp. 121
    • Siegel, R.W.1
  • 3
    • 0024926177 scopus 로고
    • For reviews, see H. Gleiter, Nanostruct. Mater. 6, 3 (1995); R. W. Siegel, ibid. 4, 121 (1994); H. Gleiter, Prog. Mater. Sci. 33, 223 (1989); R. Freer, Ed., Nanoceramics (British Ceramic Proceedings 51, Institute of Materials, London, 1993); R. W Siegel, MRS Bull. 5, 60 (1990).
    • (1989) Prog. Mater. Sci. , vol.33 , pp. 223
    • Gleiter, H.1
  • 4
    • 0029547007 scopus 로고
    • Nanoceramics
    • Institute of Materials, London
    • For reviews, see H. Gleiter, Nanostruct. Mater. 6, 3 (1995); R. W. Siegel, ibid. 4, 121 (1994); H. Gleiter, Prog. Mater. Sci. 33, 223 (1989); R. Freer, Ed., Nanoceramics (British Ceramic Proceedings 51, Institute of Materials, London, 1993); R. W Siegel, MRS Bull. 5, 60 (1990).
    • (1993) British Ceramic Proceedings 51
    • Freer, R.1
  • 5
    • 84916592492 scopus 로고
    • For reviews, see H. Gleiter, Nanostruct. Mater. 6, 3 (1995); R. W. Siegel, ibid. 4, 121 (1994); H. Gleiter, Prog. Mater. Sci. 33, 223 (1989); R. Freer, Ed., Nanoceramics (British Ceramic Proceedings 51, Institute of Materials, London, 1993); R. W Siegel, MRS Bull. 5, 60 (1990).
    • (1990) MRS Bull. , vol.5 , pp. 60
    • Siegel, R.W.1
  • 11
    • 0028194725 scopus 로고
    • See, for example, G. P. Johnston, R. Muenchausen, D. M. Smith, W. Fahrenholtz, S. J. Foltyn, J. Am. Ceram. Soc. 75, 3293 (1992); P. M. Kumar et al., Mater. Chem. Phys. 36, 354 (1994).
    • (1994) Mater. Chem. Phys. , vol.36 , pp. 354
    • Kumar, P.M.1
  • 21
    • 1842287535 scopus 로고    scopus 로고
    • A. J. Perrotta et al., unpublished material
    • A. J. Perrotta et al., unpublished material.
  • 25
    • 0014995959 scopus 로고
    • Hysteresis in adsorption isotherms, which implies a difference between the heats of adsorption and desorption, has been observed [see, for example, A. Bailey et al., Trans. Faraday Soc. 67, 231 (1971)]. However, these phenomena are usually associated with porous adsorbates, where irreversible changes in the pore structure occur upon adsorption. For the relatively nonporous aluminas considered here, the assumption that the heat of adsorption is the negative of the heat of desorption should be valid.
    • (1971) Trans. Faraday Soc. , vol.67 , pp. 231
    • Bailey, A.1
  • 27
    • 1842289934 scopus 로고    scopus 로고
    • note
    • 2O in our previous study (11).
  • 30
    • 1842405547 scopus 로고    scopus 로고
    • note
    • This work was supported by the Aluminum Company of America and NSF grants DMR 95-00812 and DMR 92-15802. We thank I. Aksay for the use of his BET surface-area-measuring equipment.


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