Effect of dewaxing procedures of cold isostatically pressed silicon nitride ceramics on its microstructure and fracture strength

2003 ◽  
Vol 14 (5) ◽  
pp. 505-517 ◽  
Author(s):  
Tadashi Hotta ◽  
Hiroya Abe ◽  
Takehisa Fukui ◽  
Makio Naito ◽  
Nobuhiro Shinohara ◽  
...  
2000 ◽  
Vol 108 (1257) ◽  
pp. 510-514 ◽  
Author(s):  
Toshiyuki TAKASHIMA ◽  
Keisuke NAKAYAMA ◽  
Tsuyoshi YAMAMOTO ◽  
Toshio NARITA

2019 ◽  
Vol 45 (12) ◽  
pp. 15671-15675 ◽  
Author(s):  
Shuang Li ◽  
Chuncheng Wei ◽  
Lijuan Zhou ◽  
Peng Wang ◽  
Weiwei Wang

1994 ◽  
Vol 9 (5) ◽  
pp. 1208-1213 ◽  
Author(s):  
Y. Iwamoto ◽  
H. Nomura ◽  
I. Sugiura ◽  
J. Tsubaki ◽  
H. Takahashi ◽  
...  

Microstructure evolution was studied in silicon nitride ceramics by a novel characterization method, and its relevance to the strength was discussed. The characterization method involves an immersion liquid for making green and partially sintered bodies transparent, and a subsequent direct optical microscopic examination. Granules for compaction process were prepared with the spray-drying process and were found to contain pores or deep dimples. Green bodies formed by CIP with these granules contain regularly arrayed pores at the center of granules and also crack-like voids at the boundaries of granules. These pores were preserved in the sintering process and resulted in large pores in the sintered body. They behave as fracture origin in ceramics and reduce the fracture strength. The Weibull modulus was high due to the presence of uniformly distributed pores.


2005 ◽  
Vol 16 (5) ◽  
pp. 425-434 ◽  
Author(s):  
Nobuhiro Shinohara ◽  
Shigeru Ohsaka ◽  
Tadashi Hotta ◽  
Hiroya Abe ◽  
Makio Makio ◽  
...  

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