Fabrication of silicon nitride with MgO/MgF2 using pressureless sintering
Küçük Resim Yok
Tarih
2009
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Polish Ceramic Society
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Because of its superior properties, that is high hardness and strength, excellent creep, oxidation and corrosion resistance as well as low density, silicon nitride is a candidate material for high temperature applications and is frequently used as cutting tools, a typical application for hard materials. In this study, various silicon nitride compositions were prepared using oxide and fluoride additives (e.g. MgO, Y2O3, MgF2). After the green samples were obtained by manual pressing, the samples were cold isostatically pressed under 250 MPa. Cold pressed samples were pressureless sintered under nitrogen atmosphere in the range 1450-1700°C for 0.5-2.5 hour. Silicon nitride sintered with the additions of MgF2 and Al2O3 gave better density and pore free micrographs especially at lower temperatures compared with the samples containing MgO plus Al2O3. Densities of samples were measured by using Archimedes principle and analyses of resulting products were carried out using SEM and X-ray diffraction.
Açıklama
11th International Conference and Exhibition of the European Ceramic Society 2009 -- 21 June 2009 through 25 June 2009 -- Krakow -- 96766
Anahtar Kelimeler
Additives, Alumina, Aluminum oxide, Ceramic materials, Corrosion resistance, Cutting tools, Hardness, High temperature applications, High temperature corrosion, Magnesia, Nitrides, Silicon nitride, Sintering, Archimedes principle, Candidate materials, Fluoride additives, Lower temperatures, Nitrogen atmospheres, Pressure-less sintering, Pressureless-sintered, Typical application, Fluorine compounds
Kaynak
11th International Conference and Exhibition of the European Ceramic Society 2009
WoS Q Değeri
Scopus Q Değeri
N/A
Cilt
1
