Evaluation of the Fracture Toughness on the Surface Layer in HIP-Sintered Silicon Nitride

This paper deals with the role of chemistry in the design of high-tech ceramic materials. Grain boundary composition of polycrystalline ceramics dictates the hardness fracture toughness and creep resistance of liquid-phase sintered silicon nitride and silicon carbide materials.

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High Temperature Fracture Toughness in Silicon Nitride and Sialon

Journal of Engineering Materials and Technology ◽

10.1115/1.2904217 ◽

1993 ◽

Vol 115 (3) ◽

pp. 268-272 ◽

Cited By ~ 6

Author(s):

Y. Mutoh ◽

N. Miyahara ◽

K. Yamaishi ◽

T. Oikawa

Keyword(s):

Fracture Toughness ◽

High Temperature ◽

Transition Temperature ◽

Silicon Nitride ◽

Glass Phase ◽

Temperature Transition ◽

Brittle To Ductile Transition ◽

Temperature Fracture ◽

Increasing Temperature ◽

Sintered Silicon

Fracture Toughness of HIP-sintered silicon nitride decreased with increasing temperature up to 1200°C. The brittle-to-ductile transition was observed in the temperature range from 1200°C to 1275°C: the fracture toughness rapidly increased in the transition region. Above the transition temperature, the fracture toughness decreased with increasing temperature. Fracture toughness of sialon increased with increasing temperature. Transition of fracture mechanism was observed in sialon around 1300°C. The differences of temperature dependence of fracture toughness between two materials are interpreted in terms of the effects of grain-boundary glass phase on fracture.

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Fracture Toughness Test of Sintered Silicon Nitride at Room and High Temperatures

Journal of the Society of Materials Science Japan ◽

10.2472/jsms.38.261 ◽

1989 ◽

Vol 38 (426) ◽

pp. 261-267 ◽

Cited By ~ 4

Author(s):

Tsuneshichi TANAKA ◽

Nagatoshi OKABE ◽

Akiyoshi SAKAIDA ◽

Hideaki NAKAYAMA

Keyword(s):

Fracture Toughness ◽

Silicon Nitride ◽

High Temperatures ◽

Fracture Toughness Test ◽

Toughness Test ◽

Sintered Silicon

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ChemInform Abstract: OXIDATION OF THIN SHEET REACTION-SINTERED SILICON NITRIDE

Chemischer Informationsdienst ◽

10.1002/chin.197824026 ◽

1978 ◽

Vol 9 (24) ◽

Author(s):

J. B. WARBURTON ◽

J. E. ANTILL ◽

R. W. M. HAWES

Keyword(s):

Silicon Nitride ◽

Thin Sheet ◽

Sintered Silicon

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Effect of Mo particle size on Microstructure and Mechanical Properties of Spark Plasma Sintered Silicon Nitride

Materials Science and Engineering A ◽

10.1016/j.msea.2021.141155 ◽

2021 ◽

pp. 141155

Author(s):

Yongxia Li ◽

Hui Qi ◽

Jia Yu ◽

Wenbo Han

Keyword(s):

Mechanical Properties ◽

Particle Size ◽

Silicon Nitride ◽

Microstructure And Mechanical Properties ◽

Spark Plasma ◽

Sintered Silicon

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Comment on ?Additional observation on the strength/nitrided density relationship for a reaction sintered silicon nitride?

Journal of Materials Science ◽

10.1007/bf00540291 ◽

1977 ◽

Vol 12 (3) ◽

pp. 627-631 ◽

Cited By ~ 10

Author(s):

R. W. Rice ◽

B. F. Jones ◽

M. W. Lindley

Keyword(s):

Silicon Nitride ◽

Additional Observation ◽

Density Relationship ◽

Sintered Silicon

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Effect of α/β phase ratio on microstructure and mechanical properties of silicon nitride ceramics

Journal of Materials Research ◽

10.1557/jmr.2001.0311 ◽

2001 ◽

Vol 16 (8) ◽

pp. 2264-2270 ◽

Cited By ~ 27

Author(s):

Hirokazu Kawaoka ◽

Tomohiko Adachi ◽

Tohru Sekino ◽

Yong-Ho Choa ◽

Lian Gao ◽

...

Keyword(s):

Fracture Toughness ◽

Silicon Nitride ◽

Phase Ratio ◽

Phase Content ◽

Sintering Process ◽

Β Phase ◽

Nitride Ceramics ◽

Pulse Electric ◽

Sintering Condition ◽

Sintered Materials

Highly densed silicon nitride ceramics with various α/β phase ratios were produced by pulse electric current sintering process. The β-phase content of Si3N4 in sintered materials varied from 20 to 100 wt% depending on the sintering condition. The microstructure was observed by scanning electron microscopy and investigated by image analysis. Young's modulus, hardness, fracture toughness, and strength were strongly dependent on the α/β phase ratio. The fracture toughness increased from 4.6 MPa m1/2 for 20-wt% b-phase content to 8.2 MPa m1/2 for 95-wt% β-phase content, and the fracture strength showed a maximum value of about 1.6 GPa at 60-to-80-wt% β-phase content.

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