Abstract
The structural evolution of α and β - Si 3N 4 has been studied up to 900°C by means of the time of flight neutron diffraction method. It has been shown that the relative evolution of lattice parameters is the same for both phases; the modifications versus temperature are isotropic along the cristallographic axas a and c. However, the atomic positions, bond angles and bond lengths at different temperatures, as well as the volume evolution of SiN4 tetrahedra compared to that of the unit cell volume, suggest a less stability of α Si 3N 4 with regard to the β phase which explains the α → β transformation at higher temperatures.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
