THE OXIDATION BEHAVIOR OF NIAL .1. PHASE-TRANSFORMATIONS IN THE ALUMINA SCALE DURING OXIDATION OF NIAL AND NIAL-CR ALLOYS
THE OXIDATION BEHAVIOR OF NIAL .1. PHASE-TRANSFORMATIONS IN THE ALUMINA SCALE DURING OXIDATION OF NIAL AND NIAL-CR ALLOYS
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DOI：
10.1016/0010-938x(92)90002-k
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发表时间：
1992-11-01
影响因子：
8.3
通讯作者：
GRABKE, HJ
中科院分区：
文献类型：
--
作者：
BRUMM, MW;GRABKE, HJ
用TGA、XRD、SEM和TEM研究了NiAl和NiAl-Cr合金在973-1673 K温度范围内的氧化物相及其氧化动力学。氧化速率取决于合金上形成的氧化物相。γ-Al_2 O_3、θ-Al_2 O_3和α-Al_2 O_3已经被观察到，并且不同的k（p）值与它们的生长相关。NiAl中的Cr加速了θ-α相变，并导致较高的k（p）值。在氧化的初始阶段中形成的Cr2 O3充当形成α-Al 2 O3的核。
The oxide phases formed on NiAl and NiAl-Cr and their oxidation kinetics have been studied in the temperature range 973-1673 K using TGA, XRD, SEM and TEM. The oxidation rate depends on the oxide phase formed on the alloy. Gamma-Al2O3, theta-Al2O3, and alpha-Al2O3 have been observed and different k(p) values were correlated to their growth. Cr in NiAl accelerates the theta-alpha transformation and leads to a higher k(p) value. Cr2O3 formed in the initial stage of oxidation acts as nuclei for the formation of alpha-Al2O3.