@article{e1eb41775ef44121899c1237069e03e3,
title = "In-situ observation of AlN formation from Ni-Al solution using an electromagnetic levitation technique",
abstract = "Aluminum nitride is a promising substrate material for AlGaN-based UV-LED. In order to develop a robust growth processing route for AlN single crystals, fundamental studies of solution growth experiments using Ni-Al alloy melts as a new solution system were performed. Al can be stably kept in solution the Ni-Al liquid even at high temperature; in addition, the driving force of the AlN formation reaction from solution can be controlled by solution composition and temperature. To investigate AlN crystal growth behavior we developed an in situ observation system using an electromagnetic levitation technique. AlN formation behavior, including nucleation and growth, was quantitatively analyzed by an image processing pipeline. The nucleation rate of AlN decreased with increasing growth temperature and decreasing aluminum composition. In addition, hexagonal c-axis oriented AlN crystal successfully grew on the levitated Ni-40 mol%Al droplet reacted at low driving force (1960 K), on the other hand, AlN crystal with dendritic morphology appeared on the sample with higher driving force (Ni-50 mol%Al, 1960 K). Thus, the nucleation rate and crystal morphology were dominated by the driving force of the AlN formation reaction.",
keywords = "aluminum nitride, crystal growth, nucleation, thermodynamics",
author = "Masayoshi Adachi and Sonoko Hamaya and Yuji Yamagata and Loach, {Andrew J.} and Fada, {Justin S.} and Wilson, {Laura G.} and French, {Roger H.} and Carter, {Jennifer L.W.} and Hiroyuki Fukuyama",
note = "Funding Information: This work was supported by JSPS KAKENHI Grant Number JP26706013, JP17K19067 and JP26249113. The work conducted by the CWRU researchers L. G. Wilson and J. L. W. Carter on the image processing pipeline was funded by the National Science Foundation under Grant No. 1152716. The authors acknowledge the assistance of B. G. Pierce and A. M. Karimi in the image processing. This materials data science collaboration between Tohoku University and Case Western Reserve University was fostered under the Japanese MEXT Top Global program. Funding Information: This work was supported by JSPS KAKENHI Grant Number JP26706013, JP17K19067 and JP26249113. The work conducted by the CWRU researchers L. G. Wilson and J. L. W. Carter on the image processing pipeline was funded by the National Science Foundation under Grant No. 1152716. The authors acknowledge the assistance of B. G. Pierce and A. M. Karimi in the image processing. This materials data science collaboration between Tohoku University and Case Western Reserve University was fostered under the Japanese MEXT Top Global program. Publisher Copyright: {\textcopyright} 2019 The Authors. Journal of the American Ceramic Society published by Wiley Periodicals, Inc. on behalf of American Ceramic Society (ACERS)",
year = "2020",
month = apr,
day = "1",
doi = "10.1111/jace.16960",
language = "English",
volume = "103",
pages = "2389--2398",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "4",
}