Combustion synthesis of Al-Ni compounds in microwave reactor

• Autorzy: Naplocha K. , Granat K.
• Języki publikacji: EN

Abstrakty

EN

Investigations of intermetallic compounds of Al-Ni system produced on the base of combustion synthesis method are presented. It was aimed to obtain homogeneous chemical constitution and porous structure used to locally reinforce castings. Production method of perform with microwave heating was elaborated. Special heating chamber with strongly focused field and possibility of exact control process was constructed. Various stoichiometric ratio samples corresponding to compounds from binary diagram were synthetized. Basing on the temperature profiles dynamics of process was analyzed, typical combustion temperatures and possible compounds were determined. Microscopic investigations with chemical analysis EDS showed considerable differences in chemical constitution and morphology of phases. Sample made from mixture of powders with composition of Al:Ni = 3:1 revealed relatively uniform porosities but considerable differences in chemical composition. With increase of Ni content the synthesis underwent at higher temperatures, with progress of reaction the melting of transient phases led to uniform chemical composition of product. Unfortunately as a result of structure fusion coagulation and closing of pores occurred excluding received structure for further attempts to infiltrate with squeeze casting method.

Słowa kluczowe

EN

intermetallics; synthesis; Al-Ni compounds

PL

komponenty Al-Ni; synteza; reaktor mikrofalowy

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2008
• Tom: Vol. 8, iss. 4
• Strony: 153--156
• Opis fizyczny: Bibliogr. 13 poz., rys., tab.

Twórcy

autor

Naplocha K.

autor

Granat K.

• Technical University of Wroclaw, Institute of Production Engineering and Automation, 50-371 Wroclaw, Łukasiewicza 3/5, Poland,

Bibliografia

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• [3] W.Wołczyński, J. Janczak-Rusch, Z.Pogoda: Formation of the Ni/Al/Ni joint structure applying an isothermal solidification, Archives of Foundry Engineering, 2008, vol. 8, 337-342.
• [4] C. Curfs, X. Turrillas, G.Vaughan, A.E. Terry, A. Kvick, M.A. Rodriguez, Al-Ni intermetallics obtained by SHS: A time-resolved X-ray diffraction, Intermetallics 15(2007) 1163-1171.
• [5] Ping Zhu, J.C.M. Li, C.T. Liu: Adiabatic temperature of combustion synthesis of Al-Ni systems, Materials Science and Engineering A357 (2003) 248 -257.
• [6] A. Biswas, S.K. Roya , K.R. Gurumurthyb , N. Prabhuc , S. Banerjee: A study of self-propagating high-temperature synthesis of NiAl in thermal explosion mode, Acta Materialia 50 (2002) 757-773.
• [7] Ping Zhua, J.C.M. Lia, C.T. Liub: Reaction mechanism of combustion synthesis of NiAl, Materials Science and Engineering A329-331 (2002) 57-68.
• [8] Morsi K.: Review: reaction synthesis processing of Ni-Al. intermetallic materials, Materials Science & Engineering, 2001, A299, s. 1-15.
• [9] F.Z. Chrifi-Alaoui, M. Nassik, K. Mahdouk, J.C. Gachon: Enthalpies of formation of the Al-Ni intermetallic compounds, Journal of Alloys and Compounds 364 (2004) 121-126.
• [10] A.Biswas, S.K. Roy: Comparison between the microstructural evolutions of two modes of SHS of NiAl: key to a common reaction mechanism, Acta Materialia 52 (2004) 257-270.
• [11] K.Naplocha, K.Granat: Wysokotemperaturowa synteza kształtek Al-Cr w polu mikrofalowym, Kompozyty 3(2008) 236-241.
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• [13] Quncheng Fan, H. Chai, Zhihao Jin: Dissolution-precipitation mechanism of self-propagating high-temperature synthesis of mononickel aluminide, Intermetallics 9 (2001) 609-619.