Moon, KI Hong, HS Hong, KT Lee, KS Kim, SJ 2024-01-21T06:35:18Z 2024-01-21T06:35:18Z 2021-09-05 2004-08-25 0921-5093 https://pubs.kist.re.kr/handle/201004/137306 The mechanically alloyed (Al + 12.5 at.% Cu)(3)Zr powders were consolidated by cold isostatic pressing (CIP) and subsequent sintering. Effects of CIP pressure and sintering temperature on the stability of metastable L1(2) phase and nanocrystalline structure were investigated. Before sintering, the powders were CIPed at 138, 207, 276, and 414 MPa. The relative densities of the CIP compacts were not greatly affected by the CIP pressure. However, the L1(2) phase of the specimen CIPed at pressures greater than 276 MPa was partially transformed into D0(23). The optimum consolidation conditions for maintaining L1(2) phase and nanocrystalline microstructure were determined to be CIP at 207 MPa and sintering at 800degreesC for 1 h for which the grain size was 34.2 nm and the relative density was 93.8%. Full density specimens could be prepared by sintering above 900degreesC, however, these specimens consisted of L1(2) and D0(23) phases. The grain sizes of all the specimens were confirmed by TEM and XRD, and were found to be less than 40 nm. This is one of the smallest grain sizes ever reported in trialuminide intermetallic compounds. (C) 2004 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA GRAIN-GROWTH COMPACTION ALUMINA Consolidation behavior of L1(2) phase (Al+12.5 at. %Cu)(3)Zr powder with nanocrystalline structure during CIP and subsequent sintering Article 10.1016/j.msea.2004.03.001 1 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.380, no.1-2, pp.46 - 51 MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 380 1-2 46 51 scie scopus 000223330200007 2-s2.0-3242713824 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Science & Technology - Other Topics Materials Science Metallurgy & Metallurgical Engineering Article GRAIN-GROWTH COMPACTION ALUMINA trialummides based on ZrAl3 nanostructured intermetallics (including preparing methods) thermal stability sintering