(西北工業(yè)大學(xué)凝固技術(shù)國家重點(diǎn)實(shí)驗(yàn)室，西安 710072)
摘 要: 采用Edmund Buhler超快速急冷液淬裝置， 結(jié)合X射線衍射(XRD)和透射電子顯微技術(shù)(TEM)， 研究了Al88Cr2Ni10-xMnx(x=0， 5， 7 或10)合金在快速凝固條件下的準(zhǔn)晶相形成規(guī)律。 結(jié)果表明， 隨著Mn含量的提高， 合金的非晶程度逐漸減 小，直至完全消失； 準(zhǔn)晶含量逐漸增加， 當(dāng)x=10時， 準(zhǔn)晶含量約為50％。在Al88Cr2Ni10合金中， 準(zhǔn)晶晶粒細(xì)小， 沒有充分長大 。 隨 著Ni含量的減小，初生相準(zhǔn)晶已經(jīng)充分長大， 呈規(guī)則的菊花狀。 Ni和Mn的含量對晶態(tài)α-Al影響不大。
關(guān)鍵字: AlCrNiMn合金 快速凝固 相形成 準(zhǔn)晶
（State Key Laboratory of Solidification Processing,
Northwestern Polytechnical University, Xi'an 710072, P. R. China）
Abstract:The quasicrystalline phase formation of rapidly solidified Al88Cr2Ni10-xMnx(x=0, 5, 7 or 10) alloys sythesized in Edmund Buhler by splat-quenching was investigated by means of X-ray diffraction(XRD) and transmission electron microscopy(TEM). The results indicated that the content of amorphous alloy decreased gradually with increasing Mn, and finally disappeared completely, while the content of the quasicrystal phase increased step by step, which was about 50% when x=10, namely in Al88Cr2Ni10-xMnx alloy. The size of quasicrystal phase in Al88Cr2Ni10 alloy was small and premature. The primary phase of quasicrystals exhibiting rosette-like microstructures was fully developed with decreasing Ni. The content of Ni and Mn had littile influence on the morphological aspects of crystalline α-Al solid solution.
Key words: AlCrNiMn alloy rapid solidification phase formation quasicrystal
