関連する実験動画
Updated: Feb 21, 2026

12:20
Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
Published on: October 5, 2013
15.1K
ニッケルビスムート合金で,一般粒子の境界で分離誘発のオーダーされた上部構造
Zhiyang Yu1, Patrick R Cantwell2, Qin Gao3
1Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA 18015, USA.
まとめ
オーダーされた上部構造は,ビスマス添加ニッケルの一般的な粒子の境界で形成され,表面の向きによって駆動され,格子配合だけではありません. この発見は多結晶合金性能に影響する.
科学分野:
- 材料科学
- 固体物理学
- 金属工学
背景:
- 粒子の境界にある合金元素と不純物は,材料の性質を大幅に変化させます.
- 双結晶における高対称性境界における溶液分離は,オーダーされた原子パターンを形成することができる.
- 多晶体における一般粒子の境界における上部構造の存在は,ほとんど不明である.
研究 の 目的:
- 多結晶材料における一般的粒度境界における粒度境界超構造の発生を調査する.
- これらの分離による再建の原動力を特定する.
- エンジニアリング合金の性能への影響を評価する.
主な方法:
- モデルシステムとしてビスマス添加ポリクリスタリンニッケルを使用した.
- ランダムに選択された一般的な粒子の境界を調べた.
- これらの境界で原子構造と分離パターンを分析した.
主要な成果:
- 一般的な穀物境界で,分離による秩序化された穀物境界の上部構造を発見した.
- これらの再構成は主に 結末の粒面の方向によって導かれることがわかりました
- 粒子の間の格子マッチングが,上部構造の形成を決定する唯一の要因ではないことを実証した.
結論:
- アドソルバット誘発の上部構造は,特殊な粒子の境界に限定されません.
- 超構造は,多結晶の様々な一般的な粒子の境界で形成される.
- この発見は,多結晶工学合金の性質を理解し制御する上で重要な意味を持つ.
関連する概念動画
Metallic Solids
21.0K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
21.0K
Types Of Superconductors
1.7K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.7K
Lattice Centering and Coordination Number
13.0K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
Types of Unit Cells
Imagine taking a large number of identical...
13.0K
Structures of Solids
19.3K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
19.3K

