アルミナ-鉄複合体のホットプレス焼結とその諸特性
スポンサーリンク
概要
- 論文の詳細を見る
Alumina-iron composite ceramics were fabricated by hot-pressing from well mixed alumina and iron powders at 1550℃ and 300 kgf/cm^2 for 30 min. Sintered bodies with nearly theoretical density were obtained for addition of less than 20 wt% Fe, but the relative density decreased gradually with increasing Fe content more than that. The alumina-iron composites showed more extensive grain growth than pure alumina, and there were many open spaces around iron grains generated by the thermal expansion mismatch. The fracture toughness increased with increasing Fe content, reaching 4MN/m^<3/2> at 50 wt% Fe. The Vickers hardness, on the other hand, decreased rapidly around 10 wt% Fe addition. The specific wear rate measured on a sintered alumina disk increased with increasing Fe content, but was lower than 10^<-7> mm^2/kgf at 40 wt% Fe, which is comparable to that of dense silicon nitride ceramics. The cutting resistance was reduced significantly by Fe addition. Especially, the tangential resistance of Al_2O_3-30 wt% Fe composite was lower than that of pure alumina by the factor of 10. The iron. which existed near the surface of composite was removed in the first few minutes when treated in boiling H_2SO_4, but no subsequent weight loss was observed. The fracture strength of the composite decreased gradually up to 600℃, and then rapidly at higher temperature.
- 社団法人日本セラミックス協会の論文
- 1988-03-01
著者
-
木下 実
大阪工業技術研究所材料物理部
-
岩佐 美喜男
大阪工業技術試験所
-
岩佐 美喜男
大阪工業技術研究所材料物理部
-
渡辺 隆司
(株)栗本鐵工所開発事業部
-
坂口 景三
(株)栗本鐵工所開発事業部
-
坂口 景三
(株)栗本鉄工所
-
岩佐 美喜男
大阪工業技術研究所
関連論文
- 窒化ケイ素セラミックスの電気的接合
- アブレーシブ条件下でのセラミックスの摩擦・摩耗
- Si-Ti-C-O繊維の表面構造が三次元繊維強化炭化ケイ素複合体の特性に及ぼす効果
- WC-Co系超硬合金の***ージョン摩耗
- ポリカルボシランの多段含浸法による三次元チラノ繊維強化炭化ケイ素複合体の作製と機械的特性
- ポリカルボシランの多段含浸法によるSiC-SiCウイスカー複合体の作製
- 3H24 マイクロブラスト法によるセラミックスの耐***ージョン性評価
- 3E04 アルミナ複合体のトライボロジ特性
- 各種窒化ケイ素球の摩耗特性
- セラミックスの評価法-3-(13)セラミックスの耐摩耗性(セラミックス基礎工学講座)