電鏡研究
(1. 大連理工大學(xué) 材料科學(xué)與工程系， 大連 116024;
2. 法國洛林理工大學(xué) 南錫礦業(yè)學(xué)院金屬材料科學(xué)與工程實(shí)驗(yàn)室， 南錫 F-54042， 法國;
3. 大連海事大學(xué) 材料工藝研究所， 大連 116026)
摘 要: 用透射電鏡對Zr65Al7.5Ni10Cu17.5塊狀非晶合金的晶化過程進(jìn)行了研究。 發(fā)現(xiàn)晶化過程的不同階段相的組成是不同的。 710K時(shí)， 主要是tI-CuZr2相和tP-Al2Zr3 相， 兩者有固定的取向關(guān)系: ［010］tI∥［010］tP, (10¯3)tI∥(202)tP。 在760K時(shí)， 除了前面的兩個(gè)相外， 又出現(xiàn)了hP2-Al2NiZr6相和hP3-α-Zr 相， 兩者也有固定取向關(guān)系:［113］hP2∥［001］hP3, (14¯1)hP2∥(21¯0)hP3。 根據(jù)它們的晶格常數(shù)的相似性可以把晶化相歸納為兩類：tI, oC, hP3和tP, hP1, hP2。 這些相都是Zr基的， 但前者富Cu和Ni， 后者富Al。 用電鏡得到的結(jié)果來標(biāo)定X射線衍射譜，結(jié)果吻合很好。
關(guān)鍵字: 大塊非晶； 晶化相； 取向關(guān)系；透射電鏡
（1. Department of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;
2. Laboratoire de Science et Génie des Matériaux Métalliques,
UMR CNRS 7584,INPL, Ecole des Mines, Parc de Saurupt,
F-54042 Nancy cedex, France;
3. Institute of Materials & Technology, Dalian Maritime University,
Dalian 116026, China）
Abstract:The crystallization process of the Zr65Al7.5Ni10Cu17.5 bulk amorphous alloy was studied by TEM. It is found that the phases appeared in various stages of the crystallization process are different. At 710K, it is found to consist mainly of tI-CuZr2 and tP-Al2Zr3 phase, between which a definite orientation relationship is found：［010］tI∥［010］tP, (10¯3)tI∥(202)tP. At 760K, in addition to the above two phases, hP2-Al2NiZr6 and hP3-α-Zr phases are found, between which there exists another orientation relationship: ［113］hP2∥［001］hP3, (14¯1)hP2∥(21¯0)hP3. Based on the analogue of lattice constants between these crystallized phases, they can be divided into two groups: one contains tI, oC, hP3 and another includes tP, hP1, hP2. Phases in both of the two groups are Zr-based, while the former is Cu-and Ni rich and the later is Al-rich. The phases determined by TEM are in good agreement with the XRD experimental result.
Key words: bulk amorphous alloy; crystallized phase; orientation relationship; transmission electron microscopy
