セラミックスのインテリジェントナノ焼結
スポンサーリンク
概要
- 論文の詳細を見る
This article describes a study of intelligent nanosintering, as the author here use this term, by which one can provide a platform for the bulk nanocrystalline synthesis using multi-variable controled thermo-mechanical processing equipped with pulse electric current and microwave heating. Emphasis is firstly placed on the set-up of the phenomenology of electric field assisted densification during heating of the amorphous ceramic powder by varying manipulating variables of electric current, compact height and millimeter wave radiation power. In the case of amorphous and/or nanocrystalline ZrO2-Al2O3, the rate of densification enhanced under electric field (E) is expressed on the basis of an Arrhenius-type equation of Newtonian viscous flow, ηp = ηp0(E) esp{Q(E)/kT}, having a decreased value of the apparent activation energy (H). Then, within the framework of sintering route map up to full-density, the optimal condition for in process nonequilibrium structure control densification is provided with the reference to constitutive equations for densification during viscous flow and/or superplastic flow and the master sintering curve for densification accompanying grain growth. Moreover, it is evidenced that a variety of nanosintering techniques makes it possible to synthesize fully densified samples of amorphous B4C, nanocrystalline cubic and tetragonal (ZrO2-3mol%Y2O3)80(Al2O3)20 using nanomechanochemically synthesized amorphous powders.
著者
関連論文
- セラミックスの非平衡反応ミリングとナノメカノケミストリー
- セラミックスのMAと固相アモルファス化のためのメディア攪拌型反応ボールミング
- パルス通電加熱型プレスによる三次元ナノ構造セラミックス高速超塑性鍛造
- インテリジェント焼結と先端材料設計
- 放電焼結の科学と新しい応用
- 新しい放電焼結法と先端材料開発
- 擬似等方圧下でのMAアモルファス粉末のパルス放電抵抗焼結
- 638 メカニカルアロイングによる合金構造のアモルファス化(粉末・急冷金属, 萌芽・境界技術, 日本鉄鋼協会第 113 回(春季)講演大会)
- 814 急冷金属基複合材料の加圧焼結と機械的性質(複合材料 : 金属基複合材料, 接合, サンドウィチ構造, 萌芽・境界技術, 日本鉄鋼協会第 112 回(秋季)講演大会)
- アモルファス金属材料の破壊のメカニクス