کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1570760 | 1514374 | 2016 | 7 صفحه PDF | دانلود رایگان |
• Gadolinium element segregated on the surface of carbon fibers.
• Block-shaped Gd4C5 and GdC2 were formed at the interface via chemical reaction.
• Gadolinium and oxygen reacted at the interface and formed nano-scaled Gd2O3.
• The precipitates formed in the interface were identified to be Mg5Gd (or Mg24Gd5) and plate-shaped long period stacking-ordered phase.
In the present work, carbon fiber reinforced magnesium-gadolinium composite was fabricated by pressure infiltration method. The phase composition, micro-morphology, and crystal structure of reaction products and precipitates at the interface of the composite were investigated. Scanning electron microscopy and energy dispersive spectroscopy analysis revealed the segregation of gadolinium element at the interface between carbon fiber and matrix alloy. It was shown that block-shaped Gd4C5, GdC2 and nano-sized Gd2O3 were formed at the interface during the fabrication process due to the interfacial reaction. Furthermore, magnesium-gadolinium precipitates including needle-like Mg5Gd (or Mg24Gd5) and thin plate-shaped long period stacking-ordered phase, were also observed at the interface and in the matrix near the interface. The interfacial microstructure and bonding mode were influenced by these interfacial products, which were beneficial for the improvement of the interfacial bonding strength.
Journal: Materials Characterization - Volume 113, March 2016, Pages 232–238