| Project/Area Number |
20560620
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Physical properties of metals
|
|---|
| Research Institution | Toyota Physical & Chemical Research Institute |
|---|
Principal Investigator |
MIZUTANI Uichiro Toyota Physical & Chemical Research Institute, 上席研究員 (00072679)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
竹内 恒博 名古屋大学, エコトピア科学研究所, 准教授 (00293655)
長谷川 正 名古屋大学, 工学研究科, 教授 (20218457)
佐藤 洋一 愛知教育大学, 教育学部, 教授 (20024094)
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
|
|---|
| Keywords | 原子 / 電子構造 / 複雑構造物質 / Hume-Rothery電子濃度則 / ガンマ相合金 / 相安定化機構 / 固溶体形成機構 |
|---|
| Research Abstract |
The gamma-brass containing 52 atoms per unit cell has been known as being typical of structurally complex alloy phases and stabilized at electrons per atom ratio e/a=21/13. This has been referred to as the Hume-Rothery electron concentration rule since the late 1920s. The principal investigator has developed the FLAPW-Fourier method to resolve quantitatively this empirical rule in the framework of the first-principles band calculations. The present research could prove that a series of gamma-brasses are stabilized by forming a pseudogap across the Fermi level as a result of the interaction of the Fermi surface with the Brillouin zone associated with the square of the reciprocal lattice vectors equal to 18.
|
