Densification Behavior of PIMed TiAl Parts (特集 The 2nd Japan-Korea Workshop on Powder Injection Molding)

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概要

• 論文の詳細を見る

• Powder Injection Molding (PIM) of Ti-48Al was attempted with a special interest in its densification behavior at different processing conditions such as debinding atmosphere, sintering temperature and time. Specimens debinded in H2 showed high densification rate, resulting in 97% density after sintering at 1350°C in vacuum for 3 hours. Fine Al<SUB>2</SUB>O<SUB>3</SUB> particles about 1 μm size were observed along the prior particle boundaries of the sintered specimens. Specimens debinded in Ar and sintered in vacuum at 1350°C and 1400°C for 3 hours resulted in similar densifications of 91.7% and 91.5%, respectively. The microstructures were, however, quite different; Sintering above α/(α+γ) transus temperature showed a fully lamellar microstructure with a coarse grain size, whereas sintering at 1350°C showed a fine grained duplex microstructure. Presintering at 1000°C for 3 hours eliminated the macro pores and improved densification to 93.4% when the specimen was subsequently sintered at 1350°C for 3 hours. Densification was improved as the sintering time increased, reaching a near full density of 98.8% after 30 hours sintering at 1350°C.

• 社団法人 粉体粉末冶金協会の論文
• 1999-08-15

著者

• Kim Nack

  Center For Advanced Aerospace Materials

• KIM Yongchan

  Center for Advanced Aerospace Materials

• YOON Taesik

  Research Institute of Industrial Science and Technology

• AHN S.

  Research Institute of Industrial Science and Technology

• Yoon T

  Research Institute Of Industrial Science And Technology

• Ahn S

  Research Institute Of Industrial Science And Technology

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• Densification Behavior of PIMed TiAl Parts (特集 The 2nd Japan-Korea Workshop on Powder Injection Molding)

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