Structure and Deformation of Intermetallic Beryllides

Abstract

Abstract: Intermetallic beryllides are potential light-weight, high-temperature structural materials. In this paper. the processing techniques, microstructure. deformation, and oxidation properties of intermetallic beryllides are described. In addition to nickel beryllides (NiBe). which is treated as a model system.other high beryllium-containing refractory beryllides, such as Nb2 Be17. VBe12. are also studied.The room temperature deformation and high-temperature creep properties of these beryllides are repor4ed. At room temperature. NiBe exhibits certain tensile ductility (~ 1 .3%). but all other beryllides are essentially brittle. Nonetheless, these beryllides become ductile at temperatures above approximately 1000℃. Their creep properties are presented. The creep properties are compared with those of intermetallic aluminides. Also. a comparison is made between the ductile-to-brittle transition behaviour of intermetallic beryllides and that of aluminides. Although beryllides are generally oxidation resistant at high temperatures, some beryllides, e.g., ZrBe13, suffer the pest reaction during oxidation at intermediate tem peratures. The pest mechanisms are proposed

TG.Nieh(Lawrence Livermore National Laboratory, P.O.Box 808, L-350, Livermore, CA 94551, USA ). Structure and Deformation of Intermetallic Beryllides[J]. J Mater Sci Technol, 1994, 10(6): 391-405.

References

[1] H .L.Hardy: J. Occupational Health, 1963, 8(4), 1.
[2] C.T.Liu: Inter. Metaly Rev., 1984, 29, 168.
[3] S,M,Bruemmer, L.A.Charlot, J.L.Brimhall,C.H.Henager, Jr., and J.P.Hirth: Philt,s. Mag., 1992,65A(5), 1083.
[4] R.L.Fleisher and R.J.Zabala: Metall. Trans., 1989,20A, 1279.
[5] S.M.Bruemmer, B.W.Arey, J.L.Brimhall andR.E.Jacobson: J. Maler. Res. Comm., 1992, 7, inpress.
[6] E.M.Grala: Mechanical Properlies of IntermetallicCompounds, ed. by J.H.Westbrook, John Wiley andSons, Inc., New York, 1960, 358.
[7] H.A.Lipsitt, D.Shechtman and R.E.Schafrik: Metall.Trans., 1975, 6A, 1991
[8] H.A.Lipsitt, D.Shechtman and R.E.Schafrik: Metall.Trans.. 1980, 11 A, 1369.
[9] M.Yamaguchi, Y.Umakoshi and T.Yamane: Philos.Mas., 1987, 55A(3), 301.
[10] M .F.Ashby: Acfa Metall., 1989, 37(5), 1273.
[11] R.Lowrie: Tran.s. AIME, 1952, 164, 1093.
[12] K.H.Hahn and K.Vedula: Scripta Metall., 1989, 23, 7.
[13] J .H.Westbrook: J. Electrochem. Soc., 1956, 103, 54.
[14] R.W.Fountain and C.R.McKinsey: Columbium andTantalum,, ed. by F.T.Sisco and E.Epremian, JohnWiley and Sons, Inc., New York, 1963, 198.
[15] R.L.Fleisher and W.R.Hibbard, Jr.: TechnicalReport, Teddington, National Physical Laboratories,1963.
[16] T.Takasugi, N.Masahashi and O.Izumi: ScriptaMetall., 1986, 20, 1317.
[17] S.C.Huang, A.I.Taub and K.-M.Chang: AclaMetall., 1984, 32, 1703.
[18] S.C.Huang: J. Mater. Res., 1986, 1, 60.
[19] A.Ball and R.E.Smallman: Acta Metall., 1966, 14,1349.
[20] J.D.Whittenberger: J. Mater. Sci., 1987, 22, 394.
[21] J.D.Whittenberger: Mater. Sci. Eng., 1985, 73, 87.
[22] T.G.Nieh, J.Wadsworth and C.T.Liu: Htyh Tempera-ture Aluminides & Intermetallics, ed. by S.H.Whang,C.T.Liu, D.P.Pope and J.O.Stiegler, The Minerals,Metals & Materials Society, Warrendale,Pennsylvania, 1990, 453.
[23] P.L.Martin, M.G.Mendiratta and H.A.Lipsitt:Metall. Trans., 1983, 14A, 2170.
[24] M.G.Mendiratta and H.A.Lipsitt: J. Mater. Sci.,1980, 15, 2985.
[25] Mukhopadhyay, G.C.Kaschner and A.K.Muhkerjee:Superplasticity in Aerospace H, ed. T.R.McNelly andC.Heikkenen, The Minerals, Metals & Materials Soci-ety, Warrendale, Pennsylvania, 1990, 33.
[26] T.G.Nieh and W.C.Oliver: Scripta Metall., 1989, 23,851.
[27] T.R.McNelley and P.N.Kalu: in Proc. of Int. Conf.on Superplasticity in Advanced Malerials(ICSAM-91), ed. S.Hori, M.Tokizane andN.Furushiro, The Japan Society for Research onSuperplasticity, 1991, 413.
[28] F.S.Pettit: Trans. AIME, 1967, 239, 1296.
[29] R.M.Paine, A.J.Stonehouse and W.W.Beaver: Proc.of Int. Symp on Compounds of Interest in Nucl. Reac-tor Tech., eds. Waber, Chiotti, and Miner,TMS-AIME, 1964, 495.
[30] F.C.Perkins: Denver Res. Inst. Rpt. DRI-203, 2962.
[31] S.M.Bruemmer, B.W.Arey and C.H.Henager: MRSSpring Meeting, San Francisco, CA, 1992.
[32] T.C.Chou and T.G.Nieh: J. Mater. Res., 1992. (inpress)