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Ordered and twinned multidomain structure in highly Al-rich mullite

Published online by Cambridge University Press:  31 January 2011

H.Z. Wang ,
T. Kulkarni ,
V.K. Sarin  and
S.N. Basu
H.Z. Wang
Affiliation:
Department of Manufacturing Engineering, College of Engineering, Boston University, Brookline, Massachusetts 02446
T. Kulkarni
Affiliation:
Department of Manufacturing Engineering, College of Engineering, Boston University, Brookline, Massachusetts 02446
V.K. Sarin
Affiliation:
Department of Manufacturing Engineering, College of Engineering, Boston University, Brookline, Massachusetts 02446
S.N. Basu*
Affiliation:
Department of Manufacturing Engineering, College of Engineering, Boston University, Brookline, Massachusetts 02446
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The structure of a region of a highly Al-rich mullite (Al4+2xSi2–2xO10–x with x ∼ 0.82; 47Al2O3-6SiO2; Al/Si ∼16) in a chemically vapor-deposited, functionally graded mullite coating was studied by high-resolution transmission electron microscopy. The region consisted of a fully ordered and twinned multidomain structure. Within each domain, well-ordered oxygen vacancies resulted in antiphase boundaries (APBs) characterized by a shift vector of [001]. The APBs were oriented parallel to (601) and (601). Along [001], the structure consisted of alternating layers of (601)- and (601)-domains with a spacing of 17d601, separated by (001) twinning planes. The (001) twinning did not generate any additional spots in the [010] mullite diffraction pattern. The lattice parameters of this ultrahigh Al-rich mullite phase were calculated from selected-area electron-diffraction patterns to be: a = 0.762 nm; b = 0.754 nm; and c = 0.291 nm.

Keywords

Chemical vapor deposition (CVD) (deposition)StructuralTransmission electron microscopy (TEM)
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 11 , November 2007 , pp. 3210 - 3217
Copyright
Copyright © Materials Research Society 2007

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References

REFERENCES

1Jacobson, N.S.: Corrosion of silicon-based ceramics in combustion environments. J. Am. Ceram. Soc. 76(1), 3 1993CrossRefGoogle Scholar
2Robinson, R.C.Smialek, J.L.: SiC recession caused by SiO2 scale volatility under combustion conditions: I. Experimental results and empirical model. J. Am. Ceram. Soc. 82, 1817 1999CrossRefGoogle Scholar
3Krishnamurthy, R., Sheldon, B.W.Haynes, J.A.: Stability of mullite protective coatings for silicon-based ceramics. J. Am. Ceram. Soc. 88(5), 1099 2005CrossRefGoogle Scholar
4Zemskova, S.M., Jones, C.Y., Cooley, K.M.Haynes, J.A.: Optimization of chemical vapor deposition parameters for fabrication of oxidation-resistant mullite coatings on silicon nitride. J. Am. Ceram. Soc. 87(12), 2201 2004CrossRefGoogle Scholar
5Doppalapudi, D.Basu, S.N.: Structure of mullite coatings grown by chemical vapor deposition. Mater. Sci. Eng., A 231, 48 1997CrossRefGoogle Scholar
6Hou, P., Basu, S.N.Sarin, V.K.: Nucleation mechanism in chemical vapor deposited mullite coatings on SiC. J. Mater. Res. 14(7), 2952 1999CrossRefGoogle Scholar
7Basu, S.N., Kulkarni, T., Wang, H.Z.Sarin, V.K.: Functionally graded chemical vapor deposited mullite environmental barrier coatings for Si-based ceramics. J. Eur. Ceram. Soc. 2007 (in press)Google Scholar
8Cameron, W.E.: Exsolution in “stoichiometric” mullite. Nature 264(23/30), 736 1976CrossRefGoogle Scholar
9Fischer, R.X., Schneider, H.Schmücker, M.: Crystal structure of Al-rich mullite. Am. Mineral. 79, 983 1994Google Scholar
10Fischer, R.X., Schneider, H.Voll, A.D.: Formation of aluminum rich 9:1 mullite and its transformation to low alumina mullite upon heating. J. Eur. Ceram. Soc. 16, 109 1996CrossRefGoogle Scholar
11Epicier, T., O’Keefe, M.A.Thomas, G.: Atomic imaging of 3:2 mullite. Acta Crystallogr., Sect. A 46, 948 1990CrossRefGoogle Scholar
12Epicier, T.: Benefits of high-resolution electron microscopy for the structural characterization of mullite. J. Am. Ceram. Soc. 74(10), 2359 1991CrossRefGoogle Scholar
13Schryvers, D., Srikrishna, K., O’Keefe, M.A.Thomas, G.: An electron microscopy study of the atomic structure of a mullite in a reaction-sintered composite. J. Mater. Res. 3, 1355 1988CrossRefGoogle Scholar
14Rahman, S.H.Weichert, H-T.: Interpretation of HREM images of mullite. Acta Crystallogr., Sect. B 46, 139 1990CrossRefGoogle Scholar
15Paulmann, C., Rahman, S.H.Strothenk, S.: Interpretation of mullite HREM images along [010] and. Phys. Chem. Miner. 21, 546 1994. 100CrossRefGoogle Scholar
16Smith, D.G.W.: The chemistry and mineralogy of some emery-like rocks from Sithean Sluaigh, Strachur. Argyllshire. Am. Mineral. 50, 1982 1965Google Scholar
17Nakajima, Y., Morimoto, N.Watanabe, E.: Direct observation of oxygen vacancy in mullite. Proc. Jpn. Acad. 51, 173 1975CrossRefGoogle Scholar
18Cameron, W.E.: Composition and cell dimensions of mullite. Ceram. Bull. 56, 1003 1977Google Scholar
19Ylä-Jääski, J.Nissen, H-U.: Investigation of superstructures in mullite by high resolution electron microscopy and electron diffraction. Phys. Chem. Miner. 10, 47 1983CrossRefGoogle Scholar
20Nakajima, Y.Ribbe, P.H.: Twinning and superstructure of Al-rich mullite. Am. Mineral. 66, 142 1981Google Scholar
21Burnham, C.W.: Composition limits of mullite, and the sillimanite-mullite solid solution problem. Carnegie Inst. Washington Year Book 63, 227 1964Google Scholar
22Rahman, S.H., Strothenk, S., Paulmann, C.Feustel, U.: Interpretation of mullite real structure via inter-vacancy correction vectors. J. Eur. Ceram. Soc. 16, 177 1996CrossRefGoogle Scholar
23Schneider, H.Komarneni, S.: Mullite WILEY-VCH Verlag GmbH & Co. KGaA Weinheim, Germany 2005 61CrossRefGoogle Scholar
24Aksay, I.A., Dabbs, D.M.Sarikaya, M.: Mullite for structural, electronic, and optical applications. J. Am. Ceram. Soc. 74(10), 2343 1991CrossRefGoogle Scholar
25Mulpuri, R.P.Sarin, V.K.: Synthesis of mullite coatings by chemical vapor deposition. J. Mater. Res. 11(6), 1315 1996CrossRefGoogle Scholar
26Basu, S.N., Hou, P.Sarin, V.K.: Formation of mullite coatings on silicon-based ceramics by chemical vapor deposition. J. Refract. Met. Hard Mater. 16, 3431 1998CrossRefGoogle Scholar
27Landuyt, J.V., Ridder, R.D., Gevers, R.Amelinckx, S.: Diffraction effects due to shear structures: A new method for determining the shear vector. Mater. Res. Bull. 5, 353 1970CrossRefGoogle Scholar
28Ridder, R.D., Landuyt, J.V.Amelinckx, S.: Diffraction effects associated with shear structures and related structures. Phys. Status Solidi A 9, 551 1972CrossRefGoogle Scholar
29Ylä-Jääski, J.: Investigation of superstructures in mullite by high resolution electron microscopy and electron diffraction. PhD. Thesis, Swiss Federal Institute of Technology Zurich, Switzerland,1983CrossRefGoogle Scholar
30Sadanaga, R., Tokonami, M.Takeuchi, Y.: The structure of mullite 2Al2O3-SiO2, and relationship with the structures of sillimanite and andalusite. Acta Crystallogr. 15, 65 1962CrossRefGoogle Scholar
31Edington, J.W.: Practical Electron Microscopy in Material Science The MacMillan Press Ltd. London 1975Google Scholar
32Guo, K.X., Ye, H.Q.Wu, Y.K.: Application of Electron-Diffraction Patterns in Crystallography The Science Press of China Beijing January 1983Google Scholar
33Cameron, W.E.: Mullite: A substitute of alumina. Am. Mineral. 62, 747 1977Google Scholar
34Duvigneaud, P.H.: Existence of mullite without silica. J. Am. Ceram. Soc. 57, 224 1974CrossRefGoogle Scholar
35Schneider, H., Fischer, R.X.Voll, D.: Mullite with lattice constants a>b. J. Am. Ceram. Soc. 76(7), 1879 1993CrossRefGoogle Scholar
36Schneider, H.Rymon-Lipinski, T.: Occurrence of pseudotetragonal mullite. J. Am. Ceram. Soc. 71(3), C-162 1988CrossRefGoogle Scholar
37Agrell, S.O.Smith, J.V.: Cell dimensions, solid solution, polymorphism, and identification of mullite and sillimanite. J. Am. Ceram. Soc. 43(2), 69 1960CrossRefGoogle Scholar
38Ban, T.Okada, K.: Analysis of local cation arrangement in mullite using 29Si magic-angle spinning nuclear magnetic resonance spectra. J. Am. Ceram. Soc. 76(10), 2491 1993CrossRefGoogle Scholar
39Ossaka, J.: Tetragonal mullite-like phase from co-precipitated gels. Nature 4792(2), 1000 1961CrossRefGoogle Scholar