Abstract
In this final set of experiments, Al NPs were employed in the as-received and ball-milled condition to produce in situ reinforced MMnCs. The NPs possess higher surface than the micro-sized counterpart. This means that they may lead to the production of nanocomposites reinforced with a much higher content of in situ reinforcement and, as a limiting and desired condition, highly reinforced composites could be produced even without relying on ex situ addition of oxide NPs. For comparison, Al micro-sized powder was consolidated in the as-received condition and after ball milling as well. Furthermore, a mix of the two above-mentioned powders was also employed to complete the frame of experimental conditions. A ball-to-powder weight ratio r = 10:1 was adopted for grinding the metal powder for 16 h using 1.5 % of stearic acid as PCA. Powder consolidation was performed by BP-ECAP. It was expected that the higher content of non-metallic compound made the consolidation of powder rather difficult. It was also known that in SPD processes, more ductile and bigger particles ease the consolidation process [3] since the driving force is the severe plastic deformation of metal powder particles. On the contrary, nano-sized particles cannot accommodate high shear strains and are inclined to slip on each other instead of being deformed. Since the back-pressure (BP) revealed to be able to more efficiently consolidate powders by ECAP, it was applied for producing the nanocomposite billets. After preliminary attempts at different temperatures, 600 °C was selected as a suitable temperature for producing the following full dense bulk samples: (1) As-received Al micro-powders consolidated by BP-ECAP, (2) As-received Al nano-powders consolidated by BP-ECAP, (3) Ball-milled Al micro-powders consolidated by BP-ECAP, (4) Ball-milled Al nano-powders consolidated by BP-ECAP, (5) Ball-milled Al micro-(50 wt%) and nano-powders (50 wt%) consolidated by BP-ECAP.
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References
A.L. Ramaswamy, P. Kaste, S.F. Trevino, A “Micro-vision” of the physio-chemical phenomena occurring in nanoparticles of aluminum. J. Energ. Mater. 22(1), 1–24 (2004). http://www.tandfonline.com/doi/abs/10.1080/07370650490438266
M. Saravanan, R.M. Pillai, B.C. Pai, M. Brahmakumar, K.R. Ravi, Equal channel angular pressing of pure aluminium—an analysis. Bull. Mater. Sci. 29, 679–684 (2006)
M. Balog, P. Krizik, M. Nosko, Z. Hajovska, M.V. Castro Riglos, W. Rajner, D.S. Liu, F. Simancik, Forged HITEMAL: Al-based MMCs strengthen with nanometric thick Al2O3 skeleton. Mater. Sci. Eng. A. 613, 82–90 (2014)
X. Wu, W. Xu, K. Xia, Pure aluminum with different grain size distributions by consolidation of particles using equal-channel angular pressing with back pressure. Mater. Sci. Eng. A 493, 241–245 (2008)
W. Xu, X. Wu, T. Honma, S.P. Ringer, K. Xia, Nanostructured Al-Al2O3 composite formed in situ during consolidation of ultrafine Al particles by back pressure equal channel angular pressing. Acta Mater. 57, 4321–4330 (2009)
M.A. Trunov, M. Schoenitz, X. Zhu, E.L. Dreizin, Effect of polymorphic phase transformations in Al2O3 film on oxidation kinetics of aluminum powders. Combust. Flame 140, 310–318 (2005)
X. Phung, J. Groza, E.A. Stach, L.N. Williams, S.B. Ritchey, Surface characterization of metal nanoparticles. Mater. Sci. Eng. A 359(1–2), 261–268 (2003). http://www.sciencedirect.com/science/article/pii/S0921509303003484
M. Balog, F. Simancik, M. Walcher, W. Rajner, C. Poletti, Extruded Al–Al2O3 composites formed in situ during consolidation of ultrafine Al powders: effect of the powder surface area. Mater. Sci. Eng. A 529, 131–137 (2011)
K. Wafers, C. Misra, Oxides and hydroxides of aluminum. Alcoa Technical Report No. 19 Revised, Alcoa Laboratories, 64 (1987)
B. Rufino, F. Boulc’h, M.V. Coulet, G. Lacroix, R. Denoyel, Influence of particles size on thermal properties of aluminium powder. Acta Materialia. 55, 2815–2827 (2007)
J.C. Sanchez-Lopez, A.R. Gonzalez-Elipe, A. Fernandez, Passivation of nanocrystalline Al prepared by the gas phase condensation method: an X-ray photoelectron spectroscopy study. J. Mater. Res. 13, 703–710 (1998)
P.E. Doherty, R.S. Davis, Direct observation of the oxidation of aluminum single-crystal surfaces. J. Appl. Phys. 34, 619–628 (1963)
K. Tomas, M.W. Roberts, Direct observation in the electron microscope of oxide layers on aluminum. J. Appl. Phys. 32, 70–75 (1961)
L.P.H. Jeurgens, W.G. Sloof, F.D. Tichelaar, E.J. Mittemeijer, Growth kinetics and mechanisms of aluminum-oxide films formed by thermal oxidation of aluminum. J. Appl. Phys. 92, 1649–1656 (2002)
L.P.H. Jeurgens, W.G. Sloof, F.D. Tichelaar, E.J. Mittemeijer, Thermodynamic stability of amorphous oxide films on metals: application to aluminum oxide films on aluminum substrates. Phys. Rev. B. 62, 4707–4719 (2000)
L. Meda, G. Marra, L. Galfetti, F. Severini, L. De Luca, Nano-aluminum as energetic material for rocket propellants. Mater. Sci. Eng. C 27, 1393–1396 (2007)
B.J. Henz, T. Hawa, M.R. Zachariah, On the role of built-in electric fields on the ignition of oxide coated nanoaluminum ion mobility versus Fickian diffusion. J. Appl. Phys. 107, 024901 (2010)
M. Valden, X. Lai, D.W. Goodman, Onset of catalytic activity of gold clusters on titania with the appearance of nonmetallic properties. Science 281, 1647–1650 (1998)
Y. Yang, S. Wang, Z. Sun, D.D. Dlott, Near-infrared laser ablation of poly tetrafluoroethylene (Teflon) sensitized by nanoenergetic materials. Appl. Phys. Lett. 85, 1493–1495 (2004)
B. Yoon, H. Hakkinen, U. Landman, A.S. Worz, J.M. Antonietti, S. Abbet, K. Judai, U. Heiz, Charging effects on bonding and catalyzed oxidation of CO on Au8 clusters on MgO. Science 307, 403–407 (2005)
B. Alinejad, K. Mahmoodi, Hydrogen generation from water and aluminum promoted by sodium stannate. Int. J. Hydrogen Energy 34, 7934–7938 (2009)
B. Strohmeier, An ESCA method for determining the oxide thickness on aluminum alloys. Surf. Interface Anal. 15, 51–56 (1990)
N.A. Thorne, P. Thuery, A. Frichet, P. Gimenez, A. Sartre, Hydration of oxide films on aluminium and its relation to polymer adhesion. Surf. Interface Anal. 18, 236240 (1990)
M. Amstutz, M. Textor, Applications of surface-analytical techniques to aluminium surfaces in commercial semifabricated and finished products. Surf. Interface Anal. 19, 595–600 (1992)
D.T.Y. Chen, DSC dehydration peaks and solubility products of Al(OH)3. Thermochim. Acta 11, 101–104 (1975)
J.M.R. Mercury, P. Pena, A.H. De Aza, D. Sheptyakov, X. Turrillas, On the decomposition of synthetic gibbsite studied by neutron thermodiffractometry. J. Am. Ceramic Soc. 89, 3728–3733 (2006)
A.D.V. Souza, C.C. Arruda, L. Fernandes, M.L.P. Antunes, P.K.K. Kiyohara, R. Salomao, Characterization of aluminum hydroxide (Al(OH)3) for use as a porogenic agent in castable ceramics. J. Eur. Ceramic Soc. 35, 803–812 (2015)
B.K. Gan, I.C. Madsen, J.G. Hockridge, In situ X-ray diffraction of the transformation of gibbsite to alfa-alumina through calcination: effect of particle size and heating rate. J. Appl. Crystallogr. 42, 697–705 (2009)
H. Wang, B. Xu, P. Smith, M. Davies, L. De Silva, C. Wingate, Kinetic modelling of gibbsite dehydration/amorphization in the temperature range 823–923 K. J. Phys. Chem. Solids 67, 2567–2582 (2006)
B. Whittington, D. Ilievski, Determination of the gibbsite dehydration reaction pathway at conditions relevant to Bayer refineries. Chem. Eng. J. 98, 89 (2004)
J. Rouquerol, F. Rouquerol, M. Granteaume, Thermal decomposition of gibbsite under low pressures: I. Formation of the boehmitic phase. J. Catal. 36, 99–110 (1975)
R. Lapovok, D. Tomus, C. Bettles, Shear deformation with imposed hydrostatic pressure for enhanced compaction of powder. Scripta Mater. 58, 898–901 (2008)
D. Hull, D.J. Bacon, Introduction to Dislocations, 4th edn. (Butterworth-Heinemann, 2001)
Z. Zhang, D.L. Chen, Contribution of Orowan strengthening effect in particulate-reinforced metal matrix nanocomposites. Mater. Sci. Eng. A 483–484, 148–152 (2008)
R.J. Arsenault, N. Shi, Dislocation generation due to differences between the coefficients of thermal-expansion. Mater. Sci. Eng. A 81, 175–187 (1986)
E.O. Hall, The deformation and aging of mild steel. Proc. Phys. Soc. London, Sect. B 64, 747–753 (1951)
N.J. Petch, The cleavage strength of polycrystals. J. Iron Steel Res. 174, 25–28 (1953)
R. Casati, A. Fabrizi, A. Tuissi, K. Xia, M. Vedani, ECAP consolidation of Al matrix composites reinforced with in-situ γ-Al2O3 nanoparticles. Mater. Sci. Eng. A648, 113–122 (2015)
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Casati, R. (2016). Consolidation of Micro- and Nano-Sized Al Powder. In: Aluminum Matrix Composites Reinforced with Alumina Nanoparticles. SpringerBriefs in Applied Sciences and Technology(). Springer, Cham. https://doi.org/10.1007/978-3-319-27732-5_7
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