Methods of Producing Ceramic on the Basis of Metal Nitrides (Review)

Tsareva, A. M.; Leonov, A. V.; Лысенков, А. С.; Sevostyanov, M. A.

doi:10.1007/s10717-019-00133-2

Cited by 2 publications

(1 citation statement)

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“…Significantly, a group of direct semiconductors, including main group nitrides GaN, InN, and their solid solutions with AlN, have become crucial in modern electronics for the development of blue-to-green light emitting diode (LED) and laser sources and, eventually, efficient phosphors for ever more affordable common-day white LED applications [ 5 , 6 , 7 ]. In another spectrum, traditional ceramic applications that mainly utilize the materials’ mechanical and thermal properties are characteristic for many transition metal nitrides, including TiN, ZrN, and WN but incorporating also such main group compounds such as BN, AlN, and Si 3 N 4 (each of which already plays a significant role in various technologies) [ 8 , 9 , 10 , 11 , 12 ]. Many emerging applications of simple and complex (alloyed and composite) nitrides exploit the synergy advantages of coexisting electronic and mechanical/thermal properties [ 1 , 2 , 3 , 4 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Composite Nitride Nanoceramics in the System Titanium Nitride (TiN)-Aluminum Nitride (AlN) through High Pressure and High Temperature Sintering of Synthesis-Mixed Nanocrystalline Powders

et al. 2021

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Presented is a study on the original preparation of individual and in situ intimately mixed composite nanocrystalline powders in the titanium nitride-aluminum nitride system, Ti:Al = 1:1 (at.), which were used in high pressure (7.7 GPa) and high temperature (650 and 1200 °C) sintering with no binding additives for diverse individual and composite nanoceramics. First, variations in precursor processing pathways and final nitridation temperatures, 800 and 1100 °C, afforded a pool of mixed in the nanosized regime cubic TiN (c-TiN) and hexagonal AlN (h-AlN) composite nanopowders both with varying average crystallite sizes. Second, the sintering temperatures were selected either to preserve initial powder nanocrystallinity (650 °C was lower than both nitridation temperatures) or promote crystal growth and recrystallization (1200 °C was higher than both nitridation temperatures). Potential equilibration towards bimetallic compounds upon solution mixing of the organometallic precursors to nanopowders, monomeric Ti[N(CH3)2]4 and dimeric {Al[N(CH3)2]3}2, was studied with 1H and 13C NMR in C6D6 solution. The powders and nanoceramics, both of the composites and individual nitrides, were characterized if applicable by powder XRD, FT-IR, SEM/EDX, Vicker’s hardness, and helium density. The Vicker’s hardness tests confirmed many of the composite and individual nanoceramics having high hardnesses comparable with those of the reference h-AlN and c-TiN ceramics. This is despite extended phase segregation and, frequently, closed microsized pore formation linked mainly to the AlN component. No evidence was found for metastable alloying of the two crystallographically different nitrides under the applied synthesis and sintering conditions. The high pressure and high temperature sintering of the individual and in situ synthesis-mixed composite nanopowders of TiN-AlN was demonstrated to yield robust nanoceramics.

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