Welcome to American Journal of Materials Science and Engineering

American Journal of Materials Science and Engineering is a peer-reviewed, open access journal that provides rapid publication of articles in all areas of materials science and engineering. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of materials science and engineering.

ISSN (Print): 2333-4665

ISSN (Online): 2333-4673

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Website: http://www.sciepub.com/journal/AJMSE

   

Article

Contribution of the GP Zones to the Hardening and to the Electrical Resistivity in Al10at.%Ag Alloy

1Solids solutions laboratory, physics faculty USTHB, BP 32, El-Alia, Algiers, Algeria


American Journal of Materials Science and Engineering. 2015, 3(1), 7-10
doi: 10.12691/ajmse-3-1-2
Copyright © 2015 Science and Education Publishing

Cite this paper:
Faiza Lourdjane, Azzeddine Abderrahmane Raho. Contribution of the GP Zones to the Hardening and to the Electrical Resistivity in Al10at.%Ag Alloy. American Journal of Materials Science and Engineering. 2015; 3(1):7-10. doi: 10.12691/ajmse-3-1-2.

Correspondence to: Azzeddine  Abderrahmane Raho, Solids solutions laboratory, physics faculty USTHB, BP 32, El-Alia, Algiers, Algeria. Email: lourdjane_faiza@yahoo.fr; raho_azzeddine@yahoo.fr

Abstract

Using microhardness and electrical resistivity measurements, the contributions of the matrix and that of the Guinier-Preston zones to the hardening and to the electrical resistivity of the Al10at.%Ag alloy are determined separately during the Guinier-Preston zones precipitation. A linear correlation between the hardness and the electrical resistivity of the as quenched alloys exists. There is also a linear relationship between the contribution of the matrix to the hardening and that to the electrical resistivity of the isothermal aged alloy. However, no linear relation exists between the hardness and the electrical resistivity of the isothermal aged alloy.

Keywords

References

[1]  Koji Inoke, Kenji Kaneko “Severe local strain and the plastic deformation of Guinier-Preston zones in the Al–Ag system revealed by three-dimensional electron tomography «Acta Materialia 54 (2006) 2957-2963.
 
[2]  A.M. Abd El-Khalek, «Transformation characteristics of Al-Ag and Al-Ag-Ti alloys » Journal of alloys and compounds 459, (2008) 281-285.
 
[3]  PH, A, Dubey. «Shape and internal structure of Guinier-Preston zones in Al-Ag » Acta metall.mater 39 (1991)1161-1170.
 
[4]  B.Schönfeld, A. Malik, G. Korotz, W.Bürher and J.S.Pedersen «Guinier-Preston zones in Al-rich Al-Cu and Al-Ag single crystals».Physica B234-236 (1997) 983-985.
 
[5]  M. Rosen, E. Horowits, L. Swartzendruber, S. Fick and R. Mehrabian: Mater. Sci. and Engineering 53 (1982), p.191.
 
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[6]  K.Matsumoto, S.Y. Komatsu, M. Ikeda, B. Verlinden, B. Ratchev, “Quantification of volume fraction of precipitates in an aged Al−1.0 mass%Mg2Si alloy”MaterialsTransactions, 2000, 41 (10) 1275-1281.
 
[7]  Raeisinia B., Poole W.J., Lloyd D.J., “Examination of precipitation in the aluminum alloy AA6111 using electrical resistivity measurements.” Materials Science and Engineering A, 2006, 420 (1-2), 245-249.
 
[8]  J. B. Nelson, D. B. Riley, “An experimental investigation of extrapolation methods in the derivation of accurate unit-cell dimensions of crystals.”, 3rd Proc. Phys. Soc. London, 57 (1945), p. 160-177.
 
[9]  J, Merlin, P, Merle F.Fouquet, F.Pelletier, “Anelastic phenomena and structural state in aluminium silver alloys.” Scripta Metalurgica 12 (3), 227-232, (1978).
 
[10]  J. Røyset and N. Ryum, “Kinetics and mechanisms of precipitation in an Al–0.2 wt.% Sc alloy.” Materials Science and Engineering A 396 (2005), 409-422.
 
[11]  B. Predel and W.Gust. “Diskontinuierliche ausscheidungsreaktionen im system Aluminium-Silber und ihre beeinflussung durch dritte legierungspartner” 10(1), 211-222, (1972).
 
[12]  American Society for Metals. Aluminium: Properties and Physical Metallurgy, 1st ed. (Metals Park, Ohio, 1984:205).
 
[13]  G. H. Koch and D. T. Kolijn: “The heat treatment of the commercial aluminium alloy 7075.” Journal of Heat Treating, Vol.1, No 2 p.3 (1979).
 
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Article

Precipitation Kinetics of the GP Zones in Al4,65at.% Ag(15%Wt.)

1Solids solutions laboratory, physics faculty USTHB, BP 32, El-Alia, Algiers, Algeria


American Journal of Materials Science and Engineering. 2015, 3(1), 11-14
doi: 10.12691/ajmse-3-1-3
Copyright © 2015 Science and Education Publishing

Cite this paper:
Faiza Lourdjane, Azzeddine Abderrahmane Raho. Precipitation Kinetics of the GP Zones in Al4,65at.% Ag(15%Wt.). American Journal of Materials Science and Engineering. 2015; 3(1):11-14. doi: 10.12691/ajmse-3-1-3.

Correspondence to: Azzeddine  Abderrahmane Raho, Solids solutions laboratory, physics faculty USTHB, BP 32, El-Alia, Algiers, Algeria. Email: raho_azzeddine@yahoo.fr

Abstract

The precipitation of the Guinier-Preston zones in Al4,65at.% Ag(15%wt.), studied using an electrical resistivity measurements technique during an isothermal aging, follows a nucleation, growth and coarsening stages. The particles growth obeys the JMAK law while their coarsening, the LSW theory. The diffusion coefficient of the solute atoms, during the GP zones formation at 125°C, is in the order of (8,69 ± 2,17).10-21m2/s. The electrical resistivity of the alloy results from the contribution of the Guinier-Preston zones and that of the matrix. Due to the weak Guinier-Preston volume fraction, the electrical resistivity of the alloy is essentially due to the matrix contribution.

Keywords

References

[1]  Koji Inoke, Kenji Kaneko “Severe local strain and the plastic deformation of Guinier-Preston zones in the Al–Ag system revealed by three-dimensional electron tomography «Acta Materialia 54 (2006) 2957-2963.
 
[2]  A.M. Abd El-Khalek, « Transformation characteristics of Al-Ag and Al-Ag-Ti alloys » Journal of alloys and compounds 459, (2008) 281-285.
 
[3]  PH, A, Dubey. «Shape and internal structure of Guinier-Preston zones in Al-Ag» Acta metall.mater 39 (1991)1161-1170.
 
[4]  B.Schönfeld, A. Malik, G. Korotz, W.Bürher and J.S.Pedersen «Guinier-Preston zones in Al-rich Al-Cu and Al-Ag single crystals ».Physica B234-236 (1997) 983-985.
 
[5]  K.Matsumoto, S.Y. Komatsu, M. Ikeda, B. Verlinden, B. Ratchev, “Quantification of volume fraction of precipitates in an aged Al−1.0 mass%Mg2Si alloy”MaterialsTransactions, 2000, 41 (10) 1275-1281.
 
Show More References
[6]  Raeisinia B., Poole W.J., Lloyd D.J., “Examination of precipitation in the aluminum alloy AA6111 using electrical resistivity measurements.” Materials Science and Engineering A, 2006, 420 (1-2), 245-249.
 
[7]  J. B. Nelson, D. B. Riley, “An experimental investigation of extrapolation methods in the derivation of accurate unit-cell dimensions of crystals.”, 3rd Proc. Phys. Soc. London, 57 (1945), p. 160-177.
 
[8]  A.J.Hillel, J.T. Edwards, P.Wilkes, “Theory of the resistivity and Hall effect in alloys during Guinier-Preston zone formation.”, Philiosophical Magazine 1975, 32 (1), 189-209.
 
[9]  P.L.Rossiter, P.Wells, “The dependence of electrical resistivity on short-range order.”, Journal of Physics, 1971, 4 354-363.
 
[10]  M. Rosen, E. Horowitz, L. Swartzendruber, S. Fick and R. Mehrabian. “The aging process in aluminium 2024 studied by means of eddy currents.” Mater. Sci. and Engineering 53 (1982), p.191
 
[11]  I.M.Lifshitz and V.V.Slyosov, “The kinetics of precipitation from supersaturated solid solutions,”J.Phys.Chem.Solids, 1961, 19, 35-50.
 
[12]  C.Wagner Z.Electrochem, “Theorie der Alterung von Niderschlagen durch Umlösen (Ostwald Reifung),” 1961, 65, 581-591.
 
[13]  B. Predel and W.Gus. “Diskontinuierliche ausscheidungsreaktionen im system Aluminium-Silber und ihre beeinflussung durch dritte legierungspartner” 10(1), 211-222, (1972).
 
[14]  T.Ungar, J. Lendvai and I. Kovacs, “Metastable phase diagram of the Al-Zn-Mg alloy system in the low concentration range of Zn and Mg”, 1979, Aluminium 55, 663-669.
 
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Article

The Effect of Iridium Addition to Platinum on the Alcohol Electrooxidation Activity

1Chemical Engineering Department, Selcuk University, Konya, Turkey

22Chemical Engineering Department, Yüzüncü Yıl University, Van Turkey


American Journal of Materials Science and Engineering. 2015, 3(1), 15-20
doi: 10.12691/ajmse-3-1-4
Copyright © 2015 Science and Education Publishing

Cite this paper:
Ozlem Sahin, Hilal Kivrak, Mustafa Karaman, Dilan Atbas. The Effect of Iridium Addition to Platinum on the Alcohol Electrooxidation Activity. American Journal of Materials Science and Engineering. 2015; 3(1):15-20. doi: 10.12691/ajmse-3-1-4.

Correspondence to: Hilal  Kivrak, 2Chemical Engineering Department, Yüzüncü Yıl University, Van Turkey. Email: hilalkivrak@gmail.com, hilalkivrak@yyu.edu.tr

Abstract

Pt-Ir@C and Pt@C catalysts were prepared by ethylene glycol method and tested for methanol and ethanol in H2SO4 electrolyte. The electrocatalytic activity of these electrocatalysts was investigated using cyclic voltammograms (CVs), linear sweep voltammograms (LSVs), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS). Their CVs show that Pt40Ir60@C catalyst present significantly high current of methanol and ethanol oxidation compared to the other catalysts. Moreover, chronoamperometric measurements showed that the steady-state current of Pt40Ir60 catalyst was also higher than other electro-catalysts. EIS analysis shows that the impedances on both the imaginary and real axes are much lower than those of the other catalysts. As a result, electrocatalytic activity measurements indicated that the Pt40Ir60 catalyst was the most active electrode for methanol and ethanol oxidation.

Keywords

References

[1]  Kashyout AB, Nassr AAA, Giorgi L, Maiyalagan T, Youssef BAB. Electrooxidation of Methanol on Carbon Supported Pt-Ru Nanocatalysts Prepared by Ethanol Reduction Method. International Journal of Electrochemical Science.6(2).379-393. Feb 2011
 
[2]  Perez J, Paganin VA, Antolini E. Particle size effect for ethanol electro-oxidation on Pt/C catalysts in half-cell and in a single direct ethanol fuel cell. Journal of Electroanalytical Chemistry. 654(1-2).108-115. May 2011.
 
[3]  Cimenti M, Hill JM. Direct utilization of ethanol on ceria-based anodes for solid oxide fuel cells. Asia-Pacific Journal of Chemical Engineering. 4(1).45-54. Jan-Feb 2009.
 
[4]  Fujiwara N, Siroma Z, Yamazaki SI, Ioroi T, Senoh H, Yasuda K. Direct ethanol fuel cells using an anion exchange membrane. Journal of Power Sources. 185(2).621-626. Dec 2008.
 
[5]  Antolini E. Catalysts for direct ethanol fuel cells. Journal of Power Sources. 170(1).1-12. Jun 2007.
 
Show More References
[6]  Neto AO, Farias LA, Dias RR, Brandalise M, Linardi M, Spinace EV. Enhanced electro-oxidation of ethanol using PtSn/CeO2-C electrocatalyst prepared by an alcohol-reduction process. Electrochemistry Communications. 10(9).1315-1317. Sep 2008.
 
[7]  Li HQ, Sun GQ, Cao L, Jiang LH, Xin Q. Comparison of different promotion effect of PtRu/C and PtSn/C electrocatalysts for ethanol electro-oxidation. Electrochimica Acta.52(24).6622-6629. Aug 2007.
 
[8]  Simoes FC, dos Anjos DM, Vigier F, et al. Electroactivity of tin modified platinum electrodes for ethanol electrooxidation. Journal of Power Sources. 167(1).1-10. May 2007.
 
[9]  Jiang LH, Zang HX, Sun GQ, Xin Q. Influence of preparation method on performance of PtSn/C anode electrocatalyst for direct ethanol fuel cells. Chinese Journal of Catalysis. 27(1).15-19. Jan 2006.
 
[10]  Harish S, Baranton S, Coutanceau C, Joseph J. Microwave assisted polyol method for the preparation of Pt/C, Ru/C and PtRu/C nanoparticles and its application in electrooxidation of methanol. Journal of Power Sources. 214.33-39. Sep 15 2012.
 
[11]  Zhang L, Kim J, Chen HM, et al. A novel CO-tolerant PtRu core-shell structured electrocatalyst with Ru rich in core and Pt rich in shell for hydrogen oxidation reaction and its implication in proton exchange membrane fuel cell. Journal of Power Sources. 196(22).9117-9123. Nov 2011.
 
[12]  Lee KS, Park HY, Cho YH, Park IS, Yoo SJ, Sung YE. Modified polyol synthesis of PtRu/C for high metal loading and effect of post-treatment. Journal of Power Sources. 195(4).1031-1037. Feb 2010.
 
[13]  Carmo M, Roepke T, Scheiba F, et al. The use of a dynamic hydrogen electrode as an electrochemical tool to evaluate plasma activated carbon as electrocatalyst support for direct methanol fuel cell. Materials Research Bulletin. 44(1).51-56. Jan 2009.
 
[14]  Li J, Liang Y, Liao Q, Zhu X, Tian X. Comparison of the electrocatalytic performance of PtRu nanoparticles supported on multi-walled carbon nanotubes with different lengths and diameters. Electrochimica Acta. 54(4).1277-1285. Jan 2009.
 
[15]  Sahin O, Kivrak H. A comparative study of electrochemical methods on Pt-Ru DMFC anode catalysts. The effect of Ru addition. International Journal of Hydrogen Energy. 38(2).901-909. Jan 24 2013.
 
[16]  Tsiakaras PE. PtM/C (M = Sn, Ru, Pd, W) based anode direct ethanol-PEMFCs. Structural characteristics and cell performance. Journal of Power Sources. 171(1).107-112. Sep 2007.
 
[17]  Li GC, Pickup PG. Decoration of carbon-supported Pt catalysts with Sn to promote electro-oxidation of ethanol. Journal of Power Sources. 173(1).121-129. Nov 2007.
 
[18]  Jiang LH, Zhou ZH, Li WZ, et al. Effects of treatment in different atmosphere on Pt3Sn/C electrocatalysts for ethanol electro-oxidation. Energy & Fuels. 18(3).866-871. May-Jun 2004.
 
[19]  Jiang LH, Zhou ZH, Zhou WJ, et al. Synthesis, characterization and performance of PtSn/C electrocatalyst for direct ethanol fuel cell. Chemical Journal of Chinese Universities-Chinese. 25(8).1511-1516. Aug 2004.
 
[20]  Vigier F, Coutanceau C, Perrard A, Belgsir EM, Lamy C. Development of anode catalysts for a direct ethanol fuel cell. Journal of Applied Electrochemistry. 34(4).439-446. Apr 2004.
 
[21]  Bergamaski K, Gonzalez ER, Nart FC. Ethanol oxidation on carbon supported platinum-rhodium bimetallic catalysts. Electrochimica Acta. 53(13).4396-4406. May 2008.
 
[22]  de Souza JPI, Queiroz SL, Bergamaski K, Gonzalez ER, Nart FC. Electro-oxidation of ethanol on Pt, Rh, and PtRh electrodes. A study using DEMS and in-situ FTIR techniques. Journal of Physical Chemistry B. 106(38).9825-9830. Sep 2002.
 
[23]  Kowal A, Gojkovic SL, Lee KS, Olszewski P, Sung YE. Synthesis, characterization and electrocatalytic activity for ethanol oxidation of carbon supported Pt, Pt-Rh, Pt-SnO2 and Pt-Rh-SnO2 nanoclusters. Electrochemistry Communications. 11(4).724-727. Apr 2009.
 
[24]  Kowal A, Li M, Shao M, et al. Ternary Pt/Rh/SnO2 electrocatalysts for oxidizing ethanol to CO2. Nature Materials. 8(4).325-330. Apr 2009.
 
[25]  Lima FHB, Gonzalez ER. Electrocatalysis of ethanol oxidation on Pt monolayers deposited on carbon-supported Ru and Rh nanoparticles. Applied Catalysis B-Environmental. 79(4).341-346. Mar 2008.
 
[26]  Lima FHB, Gonzalez ER. Ethanol electro-oxidation on carbon-supported Pt-Ru, Pt-Rh and Pt-Ru-Rh nanoparticles. Electrochimica Acta. 53(6).2963-2971. Feb 2008.
 
[27]  Li GC, Pickup PG. The promoting effect of Pb on carbon supported Pt and Pt/Ru catalysts for electro-oxidation of ethanol. Electrochimica Acta. 52(3).1033-1037. Nov 2006.
 
[28]  Suffredini HB, Salazar-Banda GR, Avaca LA. Enhanced ethanol oxidation on PbOx-containing electrode materials for fuel cell applications. Journal of Power Sources. 171(2).355-362. Sep 2007.
 
[29]  Huang MH, Wang F, Li LR, Guo YL. A novel binary Pt3Tex/C nanocatalyst for ethanol electro-oxidation. Journal of Power Sources. 178(1).48-52. Mar 2008.
 
[30]  Lee KS, Park IS, Cho YH, et al. Electrocatalytic activity and stability of Pt supported on Sb-doped SnO2 nanoparticles for direct alcohol fuel cells. Journal of Catalysis. 258(1).143-152. Aug 2008.
 
[31]  Bai YX, Wu JJ, Qiu XP, et al. Electrochemical characterization of Pt-CeO2/C and Pt-CexZr1-xO2/C catalysts for ethanol electro-oxidation. Applied Catalysis B-Environmental. 73(1-2).144-149. Apr 2007.
 
[32]  Wang JS, Xi JY, Bai YX, et al. Structural designing of Pt-CeO2/CNTs for methanol electro-oxidation. Journal of Power Sources. 164(2).555-560. Feb 2007.
 
[33]  Diaz DJ, Greenletch N, Solanki A, Karakoti A, Seal S. Novel nanoscale ceria-platinum composite electrodes for direct alcohol electro-oxidation. Catalysis Letters. 119(3-4).319-326. Dec 2007.
 
[34]  Xu CW, Shen PK, Liu YL. Ethanol electrooxidation on Pt/C and Pd/C catalysts promoted with oxide. Journal of Power Sources. 164(2).527-531. Feb 2007.
 
[35]  Bai YX, Wu JJ, Xi JY, et al. Electrochemical oxidation of ethanol on Pt-ZrO2/C catalyst. Electrochemistry Communications. 7(11).1087-1090. Nov 2005.
 
[36]  Xu CW, Shen PK, Ji XH, Zeng R, Liu YL. Enhanced activity for ethanol electro oxidation on Pt-MgO/C catalysts. Electrochemistry Communications. 7(12).1305-1308. Dec 2005.
 
[37]  Song HQ, Qiu XP, Li FS, Zhu WT, Chen LQ. Ethanol electro-oxidation on catalysts with TiO2 coated carbon nanotubes as support. Electrochemistry Communications. 9(6).1416-1421. Jun 2007.
 
[38]  Lei B, Xue JJ, Jin DP, Ni SG, Sun HB. Fabrication, annealing, and electrocatalytic properties of platinum nanoparticles supported on self-organized TiO2 nanotubes. Rare Metals. 27(5).445-450. Oct 2008.
 
[39]  Jiang QZ, Wu X, Shen M, Ma ZF, Zhu XY. Low-Pt content carbon-supported Pt-Ni-TiO2 nanotube electrocatalyst for direct methanol fuel cells. Catalysis Letters. 124(3-4).434-438. Aug 2008.
 
[40]  Song HQ, Qiu XP, Li FH. Effect of heat treatment on the performance of TiO2-Pt/CNT catalysts for methanol electro-oxidation. Electrochimica Acta. 53(10).3708-3713. Apr 2008.
 
[41]  Song HQ, Qiu XP, Guo DJ, Li FS. Role of structural H2O in TiO2 nanotubes in enhancing Pt/C direct ethanol fuel cell anode electro-catalysts. Journal of Power Sources. 178(1).97-102. Mar 2008.
 
[42]  Liu B, Chen JH, Zhong XX, Cui KZ, Zhou HH, Kuang YF. Preparation and electrocatalytic properties of Pt-SiO2 nanocatalysts for ethanol electrooxidation. Journal of Colloid and Interface Science. 307(1).139-144. Mar 2007.
 
[43]  Papaioannou E. I., Siokou A., Comninellis Ch., Katsaounis A., Pt–Ir Binary Electrodes for Direct Oxidation of Methanol in Low-Temperature Fuel Cells (DMFCs), Electrocatalysis, 4. 375–381. 2013.
 
Show Less References