The driving force for Marangoni convection during the ultra-rapid solution growth of the high. quality mono-crystalline SiC.

Research Project

Project/Area Number	22760576
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Metal making engineering
Research Institution	The University of Tokyo
Principal Investigator	YOSHIKAWA Takeshi 東京大学, 環境安全研究センター, 准教授 (90435933)
Project Period (FY)	2010 – 2011
Project Status	Completed (Fiscal Year 2011)
Budget Amount *help	¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000) Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000) Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords	シリコンカーバイド / 溶液成長 / マランゴニ対流 / 表面張力 / Fe-Si溶媒 / 温度係数 / FZ成長 / 表面活性
Research Abstract	In the present work, it was aimed to determine the major driving force for Marangoni convection during the FZ growth of silicon carbide. The experimental apparatus of the maximum bubble pressure method for alloy samples was fabricated, and then measurements of surface tensions of Fe-Si-C alloys were conducted at 1250～1450℃. The surface tensions of binary Fe-Si alloys and ternary Fe-Si-C alloys are similar, and the carbon effect on the surface tension was not observed. Accordingly, it was speculated that the Marangoni flow is driven by the temperature difference in the Fe-Si solvent during the solution growth process.