Mechanical properties of AlN-polytypoids – 15R, 12H and 21R

Synthesis and photoluminescence of blue-emitting 15R-sialon:Eu2+ phosphors

“…3 shows the SEM photograph of the 1 mol% Eu-doped 15R-sialon powder synthesized at 1800 • C. The product covers a wide distribution of particle size from fine particles of <1 m to coarse particles of ∼3 m. Most particles are agglomerated and irregular in shape. The observed particle shapes are inconsistent with previous findings that AlN-polytypoids tend to grow into fiberlike shapes during liquid-phase sintering of ceramics, and the aspect ratio decreases toward the AlN-rich compositions [22]. The reason might be associated with the type and amount of the liquid phase, both of which affect the grain growth behavior of sialon that proceeds via the dissolution-precipitation process through the liquid phase [1,2].…”

“…doi:10.1016/j.jallcom.2010.02.036 of 2 hexagonally related blocks of n/2 layers, while the nR phases consist of 3 rhombohedrally related blocks of n/3 layers. Processing and mechanical properties of AlN-polytypoids ceramics have been studied [20][21][22][23], but less attention has been paid to their luminescent properties.…”

Synthesis, phase transformation and mechanical property of SiAlON ceramics from coal gangue

“…high fracture toughness, strength and corrosion resistance [1][2][3][4][5][6] . They occur in a range of compositions with structures closely related to those of the oxide or nitride parent material from which they are derived by substitution of Al for Si and O for N. The majority of SiAlON phases are β-SiAlON, O′-SiAlON, X-phase and AlN polytypoid.…”

“…Most work is focused on investigating the mechanical property of monolithic SiAlON ceramics prepared from pure oxides and nitrides [23][24][25]. Studies concerning the mechanical properties of SiAlON ceramics prepared from natural materials are scarce.…”

Synthesis of &beta;-SiAlON-AlN-Polytypoid Ceramics from Aluminum Dross

“…[11][12][13][14][15] It has been revealed that AlN-polytypoids can offer in-situ strengthening and toughening effects in multiphase SiAlON ceramics because they possess fiber-like or lath morphology. [16][17][18] According to the phase diagram of the Si-Al-O-N system (as Fig. 1), -SiAlON can coexist with AlNpolytypoid, so it is proposed that the metallic Al in aluminum dross should be used to synthesize AlN-polytypoid and introduced into SiAlON ceramics as a toughening phase.…”