Fabrication and Properties of Quasi-Isotropic Silicon Nitride-Boron Nitride Fibrous Monoliths

Water-lubricated friction and wear of silicon nitride (Si3N4) and Si3N4/hexagonal boron nitride (H-BN) fibrous monoliths (FM) were investigated using a ball-on-flat tribometer. The effect of the BN matrix on the overall sample tribological behavior is discussed and correlated to microstructural observations. Experimental data are compared to dry and oil-lubricated wear and friction in the same materials.

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Elasticity and inelasticity of silicon nitride/boron nitride fibrous monoliths

Physics of the Solid State ◽

10.1134/1.1417186 ◽

2001 ◽

Vol 43 (11) ◽

pp. 2094-2098 ◽

Cited By ~ 9

Author(s):

B. I. Smirnov ◽

Yu. A. Burenkov ◽

B. K. Kardashev ◽

D. Singh ◽

K. C. Goretta ◽

...

Keyword(s):

Silicon Nitride ◽

Boron Nitride ◽

Fibrous Monoliths

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Interfacial Fracture Between Boron Nitride And Silicon Nitride And Its Applications To The Failure Behavior Of Fibrous Monolithic Ceramics

MRS Proceedings ◽

10.1557/proc-409-243 ◽

1995 ◽

Vol 409 ◽

Cited By ~ 1

Author(s):

D. Kovar ◽

G.A. Brady ◽

M.D. Thouless ◽

J.W. Halloran

Keyword(s):

Silicon Nitride ◽

Boron Nitride ◽

Interfacial Fracture ◽

Mechanical Tests ◽

Crack Deflection ◽

Failure Behavior ◽

Modes Of Failure ◽

Profound Influence ◽

Fibrous Monoliths ◽

Monolithic Ceramics

AbstractMechanical tests show that fibrous monolithic ceramics can exhibit graceful failure in bending due to marked crack deflection at silicon nitride/boron nitride interfaces. Model sandwich specimens were manufactured from polycrystalline silicon nitride with interphases consisting of mixtures of silicon nitride and boron nitride. The interfacial fracture resistances of the specimens were measured, and the results were correlated to the failure behavior of fibrous monolithic ceramics. It was found that the three modes of failure observed in fibrous monoliths can be correlated with the interfacial fracture resistance. In addition, anisotropy in the properties of the interphases were found to have a profound influence on crack deflection.

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Wear Performance Optimization of Silicon Nitride (Si3N4)-Hexagonal Boron Nitride (hBN) Composite Using Genetic Algorithm (GA)

Recent Patents on Materials Science ◽

10.2174/1874464810666170503125052 ◽

2017 ◽

Vol 10 (1) ◽

Author(s):

Ghalme Sachin ◽

Mankar Ankush ◽

Bhalerao Yogesh

Keyword(s):

Genetic Algorithm ◽

Silicon Nitride ◽

Boron Nitride ◽

Performance Optimization ◽

Hexagonal Boron Nitride ◽

Wear Performance

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Thermogravimetry, Differential Thermal Analysis, and Mass Spectrometry Study of the Silicon Nitride?Boron Carbide?Carbon Reaction System for the Synthesis of Silicon Carbide?Boron Nitride Composites

Journal of the American Ceramic Society ◽

10.1111/j.1151-2916.2002.tb00444.x ◽

2002 ◽

Vol 85 (9) ◽

pp. 2256-2260 ◽

Cited By ~ 13

Author(s):

Guo-Jun Zhang ◽

Jian-Feng Yang ◽

Tatsuki Ohji

Keyword(s):

Mass Spectrometry ◽

Thermal Analysis ◽

Silicon Carbide ◽

Differential Thermal Analysis ◽

Silicon Nitride ◽

Boron Nitride ◽

Boron Carbide ◽

Reaction System ◽

Mass Spectrometry Study

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Fabrication and mechanical properties of boron nitride nanotube reinforced silicon nitride ceramics

Ceramics International ◽

10.1016/j.ceramint.2018.01.041 ◽

2018 ◽

Vol 44 (6) ◽

pp. 6456-6460 ◽

Cited By ~ 8

Author(s):

Tianfeng Li ◽

Yongjun Chen ◽

Wei Li ◽

Jianbao Li ◽

Lijie Luo ◽

...

Keyword(s):

Mechanical Properties ◽

Silicon Nitride ◽

Boron Nitride ◽

Boron Nitride Nanotube ◽

Nitride Ceramics

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Mechanical Properties and Oxidation Behavior of Si3N4/BN Laminated Ceramics

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.280-283.1869 ◽

2007 ◽

Vol 280-283 ◽

pp. 1869-1872

Author(s):

Cui Wei Li ◽

Chang An Wang ◽

Yong Huang

Keyword(s):

Mechanical Properties ◽

High Temperature ◽

Silicon Nitride ◽

Boron Nitride ◽

Oxidation Behavior ◽

Elevated Temperatures ◽

Testing Procedure ◽

No Oxidation ◽

Temperature Oxidation ◽

High Temperature Oxidation Behavior

Laminated ceramics with high mechanical properties were fabricated in the Si3N4/BN system. The mechanical properties at elevated temperatures were tested, and the oxidation behavior during tested procedure was studied at the same time. The flexure strength of the Si3N4/BN laminated ceramics changed a little below 1000°C. The displacement-load curves appeared non-linear characteristic even at high temperature. During testing procedure at high temperature, oxidation behavior of silicon nitride and silicon carbide happened, and no oxidation product of boron nitride was found. The silicon nitride layers were oxidized to form a protective silicate scale, which prevented oxidation of the boron nitride interlayers. The stability of boron nitride was beneficial to the boron nitride interlayer to partition the silicon nitride matrix layers at high temperature.

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Silicon Nitride/Boron Nitride Composite by Combustion Synthesis

Materials Science Forum ◽

10.4028/www.scientific.net/msf.561-565.531 ◽

2007 ◽

Vol 561-565 ◽

pp. 531-534

Author(s):

Ke Zhang ◽

Qiang Zhang ◽

Peng Fei Wang ◽

Ling Bai ◽

Wei Ping Shen ◽

...

Keyword(s):

Silicon Nitride ◽

Boron Nitride ◽

Combustion Synthesis ◽

Bending Strength ◽

Volume Fraction ◽

Raw Materials ◽

Solid Reaction ◽

N2 Atmosphere ◽

Scanning Electron

Machinable silicon nitride/ hexahedral boron nitride (Si3N4/h-BN) composites were in-situ synthesized in a nitrogen (N2) atmosphere by means of combustion synthesis gas-solid reaction with silicon (Si) powder and h-BN as raw materials. The effect of the volume fraction of h-BN on the machinable properties of Si3N4/BN composite was studied. The results show that Si powder was fully nitrified and no residual Si was found. Microstructures by a scanning electron microscopy (SEM) show Columnar crystals of β-Si3N4 are the main phase and acicular crystals of h-BN disperse β-Si3N4 intergranular. With the increasing of the volume content of h-BN, the machinability of the composite increases, but the bending strength of composite decreases firstly and then increases. The lowest bending strength is 84.96MPa at 25% volume fraction of h-BN.

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Micromechanical characterization of chemically vapor deposited ceramic films

Journal of Materials Research ◽

10.1557/jmr.1994.2072 ◽

1994 ◽

Vol 9 (8) ◽

pp. 2072-2078 ◽

Cited By ~ 8

Author(s):

J.M. Grow ◽

R.A. Levy

Keyword(s):

Silicon Carbide ◽

Silicon Nitride ◽

Boron Nitride ◽

Silicon Dioxide ◽

Boron Carbide ◽

Young’S Modulus ◽

Young's Modulus ◽

Ceramic Films ◽

Chemically Vapor Deposited ◽

Micromechanical Characterization

In this study, nanoindentation is used to determine Young's modulus of chemically vapor deposited films consisting of silicon carbide, silicon nitride, boron carbide, boron nitride, and silicon dioxide. Diethylsilane and ditertiarybutylsilane were used as precursors in the synthesis of the silicon-based material, while triethylamine borane complex was used for the boron-based material. The modulus of these films was observed to be dependent on the processing conditions and resulting composition of the deposits. For the silicon carbide, silicon nitride, boron carbide, and boron nitride films, the carbon content in the films was observed to increase significantly with higher deposition temperatures, resulting in a corresponding decrease in values of Young's modulus. The composition of the silicon dioxide films was near stoichiometry over the investigated deposition temperature range (375–475 °C) with correspondingly small variations in the micromechanical properties. Subsequent annealing of these oxide films resulted in a significant increase in the values of Young's modulus due to hydrogen and moisture removal.

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