3-D PROFILES AND SURFACE-TOPOGRAPHY OF ALUMINA COMPACTS
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE, cilt.35, sa.2, ss.345-352, 1995 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 35 Sayı: 2
- Basım Tarihi: 1995
- Doi Numarası: 10.1016/0890-6955(94)p2393-t
- Dergi Adı: INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.345-352
- Orta Doğu Teknik Üniversitesi Adresli: Hayır
Özet
A non-contacting laser scanning profilometer, with associated hardware and software, is used for the determination of the overall shape and surface topography of cylindrical alumina compacts. The change in the shape distortion of the cylinder, defined as (R(max)-R(min))/R(min) (R is the radius of the compact), was monitored, as a function of the ambient temperature, during sintering. During sintering, an increase in the diameteral distortion values were observed. Certain surface topographic characteristics, also obtained by the laser scanning of the surfaces of the green compacts, were used to characterise the agglomerate deformation and breakdown. The deformation of agglomerates starts at very low compaction pressures. However, the inter-agglomerate pores are not eliminated until a compaction pressure of 37 MPa.