Oxidation behavior of dense Yttrium doped B2-NiAl bulk material fabricated by ball milling self-propagating high-temperature synthesis and densified by spark plasma sintering

被引：6
作者：
Munoz-Saldana, J. [1 ,2 ]
Valencia-Ramirez, A. [1 ]
Castillo-Perea, L. A. [1 ]
Diaz-De la Torre, S. [3 ]
Caceres-Diaz, L. A. [4 ]
Alvarado Orozco, J. M. [5 ]
Giraldo Betancur, A. L. [6 ]
Schulz, U. [2 ]
机构：
[1] Ctr Invest & Estudios Avanzados IPN, Lib Norponiente 2000, Queretaro 76230, Qro, Mexico
[2] German Aerosp Ctr DLR, Inst Mat Res, Cologne, Germany
[3] Ctr Invest & Innovac Tecnol IPN, Mexico City, DF, Mexico
[4] CONACYT CIATEQ AC Ctr Tecnol Avanzada, Eje 126 225, San Luis Potosi 78395, San Luis Potosi, Mexico
[5] Ctr Ingn & Desarrollo Ind, Av Playa Pie Cuesta 702, Queretaro 76125, Mexico
[6] CONACYT Ctr Invest & Estudios Avanzados IPN, Lib Norponiente 2000, Queretaro 76230, Qro, Mexico
来源：
SURFACE & COATINGS TECHNOLOGY | 2021年 / 421卷
关键词：
NiAl intermetallic; Self-propagating high temperature synthesis; Spark plasma sintering; Furnace cyclic tests; BETA-NIAL COATINGS; REACTIVE ELEMENTS; MECHANICAL-PROPERTIES; IMPLANTED YTTRIUM; SINGLE-CRYSTAL; BOND COAT; SCALE; ADDITIONS; NICKEL; MICROSTRUCTURES;
D O I：
10.1016/j.surfcoat.2021.127448
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of Y additions on the oxidation behavior in furnace cyclic tests and its correlation with thermogravimetric analysis of sintered NiAl alloys is here reported. Part of the samples got an EB-PVD 7YSZ coating on top. Highly ordered B2-NiAl intermetallic powder was obtained by self-propagating high-temperature synthesis (SHS) during ball milling of elemental precursors with Y additions in amounts between 0 and 1.5 at.%. The SHS process was optimized to identify the combination of milling parameters that leads to a sharp increase in the reaction temperature for intermetallic synthesis. The tested samples consisted of NiAl-Y buttons densified by spark plasma sintering (SPS). Furnace cyclic testing of the SPS- buttons at 1100 degrees C showed high resistance to spallation of the 7YSZ top-coat and a significant decrease in its oxide growth kinetics attributed to Y-additions. Contents below 0.5 at.% Y reduce the oxidation kinetics of NiAl exposed to thermal cycles at 1100 degrees C, while higher Y contents are favorable for a longer TBC life.
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页数：9
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