Compositions: ceramic – Ceramic compositions – Refractory
Patent
1996-05-09
1998-01-27
Group, Karl
Compositions: ceramic
Ceramic compositions
Refractory
501104, 252520, C04B 3558, C04B 35488
Patent
active
057122113
ABSTRACT:
An electrical discharge machinable MgO-Partially Stabilized Zirconia (PSZ) and titanium di-boride (TiB.sub.2) ceramic composite body of good mechanical properties and the method of making it are disclosed. The ceramic composite comprising less than 40% by weight of TiB.sub.2 balanced by 10 mole % of MgO-Partially Stabilized Zirconia is fully densified by pressureless sintering at 1850.degree. C.-1900.degree. C. and exhibits the fracture toughness (K.sub.IC) value of 8-11 MPa.multidot.m.sup.1/2 measured according to the indentation crack length method and Evans-Charles' method provided in Journal of the American Ceramic Society 1320.degree.-1400.degree. C.
REFERENCES:
patent: 4748138 (1988-05-01), Watanabe et al.
patent: 4808372 (1989-02-01), Koczak et al.
patent: 5143869 (1992-09-01), Watanabe et al.
patent: 5180696 (1993-01-01), Inoue
T. Watanabe et al., "Mechanical Properties of Hot-Pressed TiB.sub.2 -ZrO.sub.2 Composites", 68 Journal of the American Ceramic Society C-34 (1985) No Month.
S. Torizuka et al., "Effects of ZrO.sub.2 Addition on the Mechanical Properties of TiB.sub.2 HIP'ed Compacts", 100 Journal of the Ceramic Society of Japan 259-265 (1992) No Month.
C.S. Montross, "Relationships of Tetragonal Precipitate Statistics with Bulk Properties in Magnesia-Partially Stabilized Zirconia", 11 Journal of the European Ceramic Society 471-480 (1993) No Month.
J. Matsushita et al. "Sinterability and Fracture Toughness of TiB.sub.2 -ZrO.sub.2 Composites by Pressureless Sintering", 37 Journal of Powder and Powder Metallurgy 69-73 (1990) No Month.
S. Khatri et al. "Formation of TiC in in situ processed composites via solid-gas, solid-liquid and liquid-gas reaction in molten A1-Ti", A162 Materials Science and Engineering 153-162 (1993) No Month.
D. Hu et al., "Coarsening of TiC particles in a rapidly solidified Ti6A14V-TiC composite", 209 Journal of Alloys and Compounds 167-173 (1994) No Month.
Kim Hai-Doo
Park Dong-Soo
Group Karl
Korea Institute of Machinery & Materials
LandOfFree
Electrical discharge machinable MG-PSZ/TIB2 ceramic composite does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrical discharge machinable MG-PSZ/TIB2 ceramic composite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical discharge machinable MG-PSZ/TIB2 ceramic composite will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-342098