Evaluation of the intermetallic compound Al2Ti for elevated-temperature applications

Benci, J.E.; Ma, Jian-Qiang; Feist, Thomas

doi:10.1016/0921-5093(94)03201-7

Cited by 23 publications

(5 citation statements)

References 7 publications

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“…Common intermetallic compounds used today are Al 2 Ti, Al 3 Ti, Al 3 Fe, AlNi 3 , FeCrAlY, TiC, TiN and Cr 23 C 6 (Sikka et al, 1993;Benci et al, 1995;Li et al, 1997;Han and Xing, 1997;Sun et al, 2009;Dai et al, 2012;Khina and Kulak, 2013;Deng et al, 2014). The aluminides generally are applied on steel surfaces for applications in the electric power industry, petrochemical industry and other energy conversion systems due to their low cost and excellent performance (Kobayashi and Yakou, 2002;Chang et al, 2006;Wang and Chen, 2006).…”

Section: Introductionmentioning

confidence: 99%

Formation of abrasion-resistant coatings of the AlSiFexMny intermetallic compound type on the AISI 304L alloy

et al. 2016

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ABSTRACT:The α-Al 9 FeMnSi and β-Al 9 FeMn 2 Si intermetallics formed by reactive sintering of Al, Si, Mn, Fe, Cr and Ni powders have been used in AISI 304L steels to enhance microhardness. Processing variables of the reactive sintering treatment were temperature (600, 650, 700, 750 and 800 °C), pressure (5, 10 y 20 MPa) and holding time (3600, 5400 y 7200 seconds). Experimental results show that temperature is the most important variable affecting the substrate/coating formation, while pressure does not appear to have a significant effect. The results show the optimum conditions of the reactive sintering that favor the substrate/coating formation are 800 °C, 20 MPa and 7200 seconds. Under these conditions, the reaction zone between the substrate and coating is more compacted and well-adhered, with a microhardness of 1300 Vickers. The results of SEM and X-Ray diffraction confirmed the formation of α-Al 9 FeMnSi and β-Al 9 FeMn 2 Si intermetallics in the substrate/coating interface as well as the presence of Cr and Ni, indicating diffusion of these two elements from the substrate to the interface. RESUMEN: Formación de recubrimientos resistentes a la abrasión de compuestos intermetálicos del tipo AlSiFe x Mn y sobre la aleación AISI 304L.Los intermetálicos α-Al 9 FeMnSi y β-Al 9 FeMn 2 Si formados por sinterización reactiva de polvos Al, Si, Mn, Fe, Cr, Ni se han utilizado en aceros AISI 304L para mejorar la microdureza. Las variables de procesamiento de sinterización reactiva fueron temperatura (600, 650, 700, 750, y 800 °C), presión (5, 10 y 20 MPa) y el tiempo de retención (3600, 5400 7200 segundos). Los resultados experimentales muestran que la temperatura es la variable más importante que afecta a la formación del sustrato/recubrimiento, mientras que la presión no parece tener un efecto significativo una influencia significativa. Los resultados muestran las condiciones óptimas de la sinterización reactiva que favorecen la formación del sustrato/recubrimiento a 800 °C, 20 MPa y 7200 segundos. En estas condiciones, la zona de reacción entre el sustrato y el recubrimiento es más compacta y bien adherida, con microdureza de 1300 Vickers. Los resultados de MEB y DRX confirman la formación de intermetálicos α-Al 9 FeMnSi y β-Al 9 FeMn 2 Si en la interfase sustrato/ recubrimiento, así como la presencia de Cr y Ni, indicando la difusión de estos dos elementos del sustrato a la interfaz.

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Section: Introductionmentioning

confidence: 99%

Formation of abrasion-resistant coatings of the AlSiFexMny intermetallic compound type on the AISI 304L alloy

et al. 2016

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“…Unfortunately, a thermal expansion coefficient of Al 2 Ca is unknown. Benci et al 21) reported that that the thermal expansion coefficient of Al 2 Ti is 1:2 Â 10 À5 K À1 at 473 K. Hence, assuming that a thermal expansion coefficient of Al 2 Ca is the same as that of Al 2 Ti, Á' CTE due to the Ca addition is estimated to be 12 MPa for the forged Mg-Ca alloy.…”

Section: Discussionmentioning

confidence: 99%

Tensile Properties of Forged Mg-Al-Zn-Ca Alloy

et al. 2008

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Continuously-casted Mg-9Al-1Zn-1Ca (in mass%) alloy (Mg-Ca alloy) and Mg-9Al-1Zn alloys (Ca-free Mg alloy) were forged at 573 K and their mechanical properties were investigated by tension tests at ambient temperature and 573 K. The forged Mg-Ca alloy showed higher 0.2% proof stress than the forged Ca-free Mg alloy. The high strength for the Mg-Ca alloy was attributed not only to grain refinement by hot forging, but also to the strengthening mechanisms arising from the difference in thermal expansion and geometrical incompatibility between Mg matrix and second phase. The Ca addition decreased the elongation to failure; however, the decrease was reduced for the forged specimens, compared to the unforged specimen. This results from segmentation of the second phases by the hot forging. Also, the forged Mg-Ca alloy showed a large elongation of 284% at 573 K.

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“…The Al 2 Ti compound is considered stable up to 1216 • C, existing with a very narrow Al range between 60 and 67 at % [29]. Al 2 Ti is one of the four intermetallic phases in the Ti-Al binary system that are stable below 1150 • C [34]. Al 2 Ti is a very promising material for elevated-temperature applications.…”

Section: Deposition Of Titanium and Aluminium Onto Gcmentioning

confidence: 99%

Electrochemical Deposition of Al-Ti Alloys from Equimolar AlCl3 + NaCl Containing Electrochemically Dissolved Titanium

Cvetković

Vukićević

Milicevic-Neumann

et al. 2020

Metals

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Al-Ti alloys were electrodeposited from equimolar chloroaluminate molten salts containing up to 0.1 M of titanium ions, which were added to the electrolyte by potentiostatic dissolution of metallic Ti. Titanium dissolution and titanium and aluminium deposition were investigated by linear sweep voltammetry and chronoamperometry at 200 and 300 °C. Working electrodes used were titanium and glassy carbon. The voltammograms on Ti obtained in the electrolyte without added Ti ions indicated titanium deposition and dissolution proceeding in three reversible steps: Ti4+ ⇄ Ti3+, Ti3+ ⇄ Ti2+ and Ti2+ ⇄ Ti. The voltammograms recorded with glassy carbon in the electrolyte containing added titanium ions did not always clearly register all of the three processes. However, peak currents, which were characteristics of Al, Ti and Al-Ti alloy deposition and dissolution, were evident in voltammograms on both working electrodes used. A constant potential electrodeposition regime was used to obtain deposits on the glassy carbon working electrode. The obtained deposits were characterized by SEM, energy-dispersive spectrometry and XRD. In the deposits on the glassy carbon electrode, the analysis identified an Al and AlTi3 alloy formed at 200 °C and an Al2Ti and Al3Ti alloy obtained at 300 °C.

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Evaluation of the intermetallic compound Al2Ti for elevated-temperature applications

Cited by 23 publications

References 7 publications

Formation of abrasion-resistant coatings of the AlSiFe<sub>x</sub>Mn<sub>y</sub> intermetallic compound type on the AISI 304L alloy

Formation of abrasion-resistant coatings of the AlSiFe<sub>x</sub>Mn<sub>y</sub> intermetallic compound type on the AISI 304L alloy

Tensile Properties of Forged Mg-Al-Zn-Ca Alloy

Electrochemical Deposition of Al-Ti Alloys from Equimolar AlCl3 + NaCl Containing Electrochemically Dissolved Titanium

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