ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Various combinations of Al4C3, B4C, and carbon were used as sintering aids for pressureless sintering of alpha-SiC (94% 6H+ 6% 15R) powders. Densification behavior, polytypic transformation, microstructural development, and mechanical properties were studied. Appropriate amounts of Al4C3-B4C-C additions could facilitate alpha-SiC powders being pressureless sintered to high densities (〉95% TD) at temperatures greaterthan equal to1850°C. Even using an alpha-SiC as a starting powder, many elongated grains developed in the microstructures during sintering at low temperature that might contribute to toughening. Anisotropic grain growth was found to be associated with the faulted structures and the 6H→ 4H phase transformation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.1999.tb02026.x
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