Abstract
A sedimentation method has been used to separate powder with a large particle size distribution into size fractions, each of different mean particle size and narrow size distribution. These powder fractions were then pressed and sintered into ceramic specimens having uniform grain shapes and narrow grain size distributions. This method of separating powder fractions raises the question of the surface degradation of the material during sedimentation. The possibility of regenerating the degraded surface by re-annealing is then significant. In this work we have studied this behaviour by XPS and a.c. susceptibility measurements. Characteristic XPS peaks for monitoring changes due to degradation and regeneration were found in the Y 3d (), O 1s ( eV) and C 1s ( eV) regions. Our results suggest that annealing below the sintering temperature can regenerate the particle surfaces.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
