Characterization of TiN-AlN Composites Prepared Through Mechanical Alloying and Followed by Pressure Sintering

Du, Ruoxin; Okamura, Hiroshi; Watanabe, Ryuzo; Kawasaki, Akira

doi:10.2320/matertrans.45.2669

Cited by 7 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Powder sintering with no binding aids has been frequently reported for the system Ti-Al-N to make mechanically robust bulk material forms. Sintered compacts of TiN and AlN (including some adventitious Al 2 O 3 ) with high densities and significant Vicker’s hardness were prepared by, first, mechanical alloying of commercial powders of AlN, Ti, and ammonium carbonate and, second, application of either hot pressing (400 MPa, 1473 K, N 2 atmosphere) or spark plasma sintering (50 MPa, 1523 K, vacuum) [ 38 ]. Hot pressing of various TiN and AlN powder mixtures afforded a pool of compact ceramics with high Vicker’s hardness and controlled wear resistance [ 39 ], whereas the electric spark-assisted process was applied for such powder mixtures to make wear-resistant TiN-AlN coatings [ 40 ].…”

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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…A number of additive materials such as titanium carbide (TiC), titanium nitride (TiN) and zirconium (Zr) are used to increase the fracture toughness and flexural strength of AlN‐based materials . These composites have been extensively studied for their possible applications in microelectronic devices, protective coatings for cutting tools, corrosion resistance, tribology and other mechanical devices .…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of the Microstructure of AlN–TiN Composites

Patel

Vaish

Sinha

et al. 2014

Strain

View full text Add to dashboard Cite

Finite element modelling (FEM) is performed on AlN-TiN composites. The structure-property relationships are studied for 5 and 10 vol.% TiN composites in view of thermal and thermo-mechanical properties. Thermal stresses are simulated at various temperatures for the 5 and 10% TiN samples in homogeneous and heterogeneous temperature environments. It is found that compressive stresses are associated with the microstructure and these stresses are largest at the interface of the AlN-TiN phases. In addition, thermal strains are simulated at various temperatures for both the compositions. Thermal conductivity and thermal expansion coefficient are estimated using FEM and compared with other known analytical methods.

show abstract

“…solid solution. The calculations were carried out in the framework of Density Functional Theory (DFT), using the full-potential method with Augmented Plane Waves + local orbitals (APW+ lo) formalism, as implemented in the WIEN 2k code [25][26][27][28].…”

Section: Resultsmentioning

confidence: 99%

Thermal Decomposition of Supersaturated Ti<sub>1-x</sub>Al<sub>x</sub>N Solid Solution Synthesized by High-Energy Milling

Radune

Zinigrad

Fuks

et al. 2016

View full text Add to dashboard Cite

Supersaturated titanium-aluminum nitride (Ti1-xAlxN) is a very attractive material for a wide range of applications due to its high oxidation and wear resistance accompanied by high strength, hardness, thermal conductivity and thermal shock resistance. Currently, its applications are limited to coatings obtained by physical or chemical deposition. Bulk materials based on Ti1-xAlxN may be fabricated by powder metallurgy approach using powders synthesized by high-energy ball milling (HEBM), which composition corresponds to supersaturated Ti1-xAlxN solid solution. In the present study, thermal stability of the supersaturated Ti1-xAlxN solid solution was investigated. According to the quasi-binary TiN-AlN phase diagram, constructed using density functional theory (DFT) analysis, the concentration ranges, where decomposition takes place through spinodal decomposition or through nucleation and growth, were determined. Experimental study on thermal stability of solid Ti1-xAlxN solution powder was conducted by means of differential scanning calorimetry (DSC), Brunauer-Emmited-Teller (BET) and XRD. The results indicated that spinodal decomposition of Ti1-xAlxN starts at 800°C, while at temperature higher than 1300°C regular decomposition (nucleation and growth) is occur.

show abstract

Characterization of TiN-AlN Composites Prepared Through Mechanical Alloying and Followed by Pressure Sintering

Cited by 7 publications

References 15 publications

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

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

Finite Element Analysis of the Microstructure of AlN–TiN Composites

Thermal Decomposition of Supersaturated Ti<sub>1-x</sub>Al<sub>x</sub>N Solid Solution Synthesized by High-Energy Milling

Contact Info

Product

Resources

About