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光激发荧光谱术分析Co-Cr-Al(Y)纳米涂层的氧化 Ⅰ.Al_2O_3相的表征与相转变 被引量:3

PHOTO-STIMULATED LUMINESCENCE SPECTROSCO-PIC ANALYSIS OF THE OXIDATION OF MAGNETRON SPUTTERED Co-Cr-Al(Y) NANOCOATINGS I. Phase Characterization and Transformation of A12O3
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摘要 磁控溅射Co—Cr—Al(Y)纳米涂层在1000,1100和1200℃氧化一定时间后,用光激发荧光谱技术表征热生长的Al2O3相.发现氧化层局部区域存在由非稳态相向稳态相的转变,即: γ→θ→α;其转变过程随温度升高显著加快,并在1200℃下变得不明显.在相同温度下,Y明显减缓Al2O3相转变过程. Thermally-grown alumina formed at 1000, 1100 and 1200 癈 on magnetron-sputtered Co-Cr-Al nanocoatings with and without yttrium additions has been characterized using photo-stimulated luminescence spectroscopy (PSLS). The measurements on some locations provided a scenario in relation to time-dependent evolution of the luminescence spectrum, which revealed a two-stage phase transformation of alumina, from metastable 7, 0 phases to stable a: phase. The transient time was shortened with increasing temperature and can almost not be characterized at 1200℃. PSLS analysis also demonstrated that yttrium appears to play a role in slowing down the phase trasformation.
出处 《金属学报》 SCIE EI CAS CSCD 北大核心 2003年第10期1055-1059,共5页 Acta Metallurgica Sinica
基金 中国科学院"引进海外杰出人才"资助项目
关键词 光激发荧光谱术 A12O3 相转变 Co—Cr—Al(Y)纳米涂层 磁控溅射 photo-stimulated luminescence spectroscopy, alumina scale, phase transformation, nanocoating Co-Cr-Al(Y), magnetron-sputtering
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