Wettability of silicon nitride ceramic composites by silver, copper and silver copper titanium alloys

2005 ◽  
Vol 25 (10) ◽  
pp. 1757-1763 ◽  
Author(s):  
Robert Klein ◽  
Martine Desmaison-Brut ◽  
Patrick Ginet ◽  
Alida Bellosi ◽  
Jean Desmaison
Keyword(s):  
Silicon Nitride ◽  
Titanium Alloys ◽  
Ceramic Composites ◽  
Silicon Nitride Ceramic ◽  
Silver Copper

scholarly journals DC conductivity of silicon nitride based carbon-ceramic composites

2007 ◽  
Vol 1 (1-2) ◽  
pp. 57-61 ◽  
Author(s):  
B. Fényi ◽  
N. Hegman ◽  
F. Wéber ◽  
P. Arató ◽  
Cs. Balázsi
Keyword(s):  
Silicon Nitride ◽  
Ceramic Composite ◽  
Ceramic Composites ◽  
Electrical Conductor ◽  
Silicon Nitride Ceramic ◽  
Carbon Additives ◽  
Nitride Ceramics ◽  
Conductivity Range ◽  
Carbon Ceramic ◽  
Insulating Properties

The silicon nitride ceramics are usually known as strongly refractory and enduring materials and have typical electrically insulating properties. If the reinforcing phase of ceramic composite (that is mainly put in the material to improve mechanical properties) is a good electrical conductor, it is worth to investigate the composite in electrical aspect. In this work carbon nanotubes, black-carbon and graphite were added to the basic silicon nitride ceramic and the electrical conductivity of the prepared carbon-ceramic composites was determined. The conductivity of the ceramic composites with different type and concentration of the carbon additives was observed by applying four point DC resistance measurements. Insulator and conductor composites in a wide conductivity range can be produced depending on the type and quantity of the additives. The additive types as well as the sintering parameters have influence on the basic electrical properties of the conductor composites.

Silicon Nitride Ceramic Composites with High Toughness

Nature ◽  
1971 ◽  
Vol 229 (5281) ◽  
pp. 192-193 ◽  
Author(s):  
M. W. LINDLEY ◽  
D. J. GODFREY
Keyword(s):  
Silicon Nitride ◽  
Ceramic Composites ◽  
Silicon Nitride Ceramic ◽  
High Toughness

Bonding of silicon nitride ceramic composites with Y2O3–La2O3–Al2O3–SiO2 mixtures

2002 ◽  
Vol 17 (8) ◽  
pp. 1969-1972 ◽  
Author(s):  
Fei Zhou ◽  
Zheng Chen
Keyword(s):  
Silicon Nitride ◽  
Joint Strength ◽  
Bonding Temperature ◽  
Hold Time ◽  
Ceramic Composites ◽  
X Ray Diffraction ◽  
Silicon Nitride Ceramic ◽  
Bending Tests ◽  
X Ray ◽  
Four Point Bending

Silicon nitride ceramic composites were bonded using mixed Y2O3, La2O3, Al2O3, and SiO2 powers. The effect of bonding conditions on the joint strength was studied. The joint strength under different bonding conditions was measured by four-point bending tests. The interfacial microstructures were observed and analyzed by scanning electron microscopy, electron probe microanalysis (EPMA), and x-ray diffraction (XRD), respectively. The results of EPMA and XRD analyses showed that the liquid/glass solders reacted with silicon nitride at the interface, forming a Si3N4//Si2N2O/Y–La–Si–Al–O–N glass/Y–La–Si–Al–O glass gradient interface. From the results of the four-point bending tests, it is known that with an increase in bonding temperature and hold time, the joint strength first increased, reached a peak, and then decreased. LaYO3 precipitated from the joint glass can improve strength of the joint at both room and high temperatures.

Interfacial reaction and joint strength of silicon nitride ceramic composites bonded with Y2O3–Al2O3–SiO2–Si3N4 mixture

2002 ◽  
Vol 55 (1-2) ◽  
pp. 55-60 ◽  
Author(s):  
Fei Zhou ◽  
Chang-Min Suh ◽  
Seock-Sam Kim
Keyword(s):  
Silicon Nitride ◽  
Interfacial Reaction ◽  
Joint Strength ◽  
Ceramic Composites ◽  
Silicon Nitride Ceramic

Influence of Microstructure on Mechanical Response of Silicon Nitride Ceramic Composites in Nano-, Micro- and Macro-Volume of Material

2009 ◽  
Vol 409 ◽  
pp. 346-349
Author(s):  
Olga Shikimaka ◽  
Daria Grabco ◽  
Katalin Balázsi ◽  
Z. Danitsa ◽  
I. Mirgorodscaia ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Mechanical Response ◽  
Multiwall Carbon Nanotubes ◽  
Ceramic Composites ◽  
General Tendency ◽  
High Fracture ◽  
Silicon Nitride Ceramic ◽  
Nitride Ceramics ◽  
Hardness Increase ◽  
Dynamic Nanoindentation

The peculiarities of contact-induced deformation in nano-, micro- and macroscopic scale of silicon nitride ceramic composites have been studied by using quasistatic macro- and microindentation techniques, dynamic nanoindentation technique and microstructure investigations. The addition of multiwall carbon nanotubes (MWCNTs) to the ceramic matrix showed the modification of microstructure leading to the modification of mechanical behavior of material: increase of fracture toughness along with the decrease of hardness. The general tendency of hardness increase with decrease of deformation volume was observed for silicon nitride ceramics, as well as, a high fracture resistance in micro- and nano-deformed volumes of material.

Silicon Nitride Ceramic Matrix for CMCs from Silane Derived Si Powders and Preceramic Polymers

1994 ◽  
Vol 365 ◽  
Author(s):  
Wendell E. Rhine ◽  
Annamarie Lightfoot ◽  
Dietmar Seyferth ◽  
John S. Haggerty
Keyword(s):  
Mechanical Properties ◽  
Silicon Nitride ◽  
Ceramic Matrix ◽  
Ceramic Composites ◽  
Ceramic Fibers ◽  
Silicon Nitride Ceramic ◽  
Laser Pyrolysis ◽  
Preceramic Polymers ◽  
Sic Fibers ◽  
Potential Matrix

ABSTRACTSi powders synthesized by the laser pyrolysis of silane can be nitrided at 1200–1250°C, producing an improved reaction bonded silicon nitride. This RBSN is a potential matrix for composites since it can be formed at temperatures which do not degrade the strengths of commercially available amorphous ceramic fibers. However, the density of the RBSN matrix has been limited to about 75% using the silane-derived Si powder. Combining Si powders and preceramic polymers offers an approach for increasing the density and mechanical properties of the reaction-formed Si3N4 matrix. The incorporation of polysilazanes inhibited the nitridation at 1250°C, but samples could be effectively nitrided at 1400°C. These higher nitriding temperatures are compatible with SCS-6 and other lowoxygen, crystalline SiC fibers which can be used as reinforcements for ceramic composites.

Negative permittivity behavior in carbon fibre/silicon nitride ceramic composites prepared by spark plasma sintering

2021 ◽  
Author(s):  
Chuanbing Cheng ◽  
Yuanhui Liu ◽  
Shaojie Shi ◽  
Rongwei Ma ◽  
Tailin Wang ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Carbon Fibre ◽  
Spark Plasma Sintering ◽  
Ceramic Composites ◽  
Negative Permittivity ◽  
Silicon Nitride Ceramic ◽  
Plasma Sintering ◽  
Spark Plasma

Microstructure and Microchemistry of Interfaces in Structural Ceramic Composites

1996 ◽  
Vol 458 ◽  
Author(s):  
K. B. Alexander ◽  
P. F. Becher ◽  
P. M. Rice ◽  
D. Braski ◽  
E. Y. Sun
Keyword(s):  
Silicon Nitride ◽  
High Resolution Electron Microscopy ◽  
Ceramic Composites ◽  
Silicon Nitride Ceramic ◽  
Resolution Electron ◽  
Phase Chemistry ◽  
Electron Energy Loss ◽  
Ceramic Interfaces ◽  
Composite Interfaces

ABSTRACTThe performance of reinforced ceramics, particularly the toughness and creep resistance, is often determined by the nature of the interface between the reinforcement and the ceramic matrix. Specially-designed experiments to investigate the role of the interfacial characteristics on toughening mechanisms and crack propagation in reinforced (silicon carbide whisker reinforced alumina) and self-reinforced (silicon nitride) ceramic composites will be described. In the whisker-reinforced composites, the interfacial topography and chemistry were of primary importance, whereas in the silicon nitride materials the formation of interfacial phases and glassy-phase chemistry influenced the interfacial debonding process. The composite interfaces were characterized by high resolution electron microscopy and high spatial resolution microchemical analysis, including energy-dispersive X-ray and electron energy loss spectroscopy. Results from energy-filtered images from ceramic interfaces will also be shown.

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