TY - JOUR
T1 - Microstructure and properties of porous si3N4 Ceramics with a dense surface
AU - Li, Xiangming
AU - Yin, Xiaowei
AU - Zhang, Litong
AU - Pan, Tianhao
PY - 2011/5
Y1 - 2011/5
N2 - Porous Si3N4 ceramics with a dense surface are fabricated by a joint process of pressureless sintering and chemical vapor deposition (CVD). Before CVD, the Si3N4 ceramic shows a uniform microstructure with well-distributed pores. During CVD, the depositions of Si3N4 in the inner surface and on the external surface of the ceramics lead to a decrease of porosities and pore sizes. As a result, both the flexural strength and fracture toughness of the Si3N 4 ceramic increase by >30%, the surface hardness increases more than five times, and the dielectric constant and loss increase slightly.
AB - Porous Si3N4 ceramics with a dense surface are fabricated by a joint process of pressureless sintering and chemical vapor deposition (CVD). Before CVD, the Si3N4 ceramic shows a uniform microstructure with well-distributed pores. During CVD, the depositions of Si3N4 in the inner surface and on the external surface of the ceramics lead to a decrease of porosities and pore sizes. As a result, both the flexural strength and fracture toughness of the Si3N 4 ceramic increase by >30%, the surface hardness increases more than five times, and the dielectric constant and loss increase slightly.
UR - http://www.scopus.com/inward/record.url?scp=79955657974&partnerID=8YFLogxK
U2 - 10.1111/j.1744-7402.2009.02472.x
DO - 10.1111/j.1744-7402.2009.02472.x
M3 - 文章
AN - SCOPUS:79955657974
SN - 1546-542X
VL - 8
SP - 627
EP - 636
JO - International Journal of Applied Ceramic Technology
JF - International Journal of Applied Ceramic Technology
IS - 3
ER -