Chemical and microstructural investigations of high-temperature interactions between AlN and TiO2

Mocellin, A.; Bayer, George T.

doi:10.1007/bf01113778

Cited by 27 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This implied that an Al 2 O 3 –TiN composite can be fabricated by SPS according to reaction . Based on Mocellin and Bayer's report, a reduced titanium pseudobrookite (Al x Ti 1− x ) 2 TiO 5 phase is generated and subsequently disappears during the reaction process 5 . However, in the present work, a pseudobrookite (Al x Ti 1− x ) 2 TiO 5 phase was not found despite the short reaction time.…”

Section: Results and Dicussioncontrasting

confidence: 43%

“…Thus, TiN has been attracting increasing interest as a constituent of composites for a wide range of applications, such as cutting tools, tool coating, solar‐control films, and microelectronics 2 . Especially, the incorporation of TiN as a particulate second phase into an Al 2 O 3 matrix has received attention 1–7 . Al 2 O 3 ceramics are excellent high‐temperature materials, but they are difficult to generate by mechanical methods into complex shapes because of their high brittleness and hardness.…”

Section: Introductionmentioning

confidence: 99%

“…Al 2 O 3 –TiN composite materials are usually fabricated by sintering mechanically mixed powders 3,5 . However, the preparation of particulate nanocomposites by conventional powder processing possibly generates relatively large agglomerates or inclusions of the dispersion phase when nanosized powders are used as starting materials, and therefore limits the degree of microstructural homogeneity.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Novel Fabrication Route to Al₂O₃–TiN Nanocomposites Via Spark Plasma Sintering

Wang

et al. 2006

Journal of the American Ceramic Society

View full text Add to dashboard Cite

A novel method for the preparation of Al 2 O 3 -TiN nanocomposites was developed. A mixture of TiO 2 , AlN, and Ti powder was used as the starting material to synthesize the Al 2 O 3 -TiN nanocomposite under 60 MPa at 14001C for 6 min using spark plasma sintering. X-ray diffractometry, scanning electron microscopy, and transmission electron microscopy were used for detailed microstructural analysis. Dense (up to 99%) nanostructured Al 2 O 3 -TiN composites were successfully fabricated, the average grain size being less than 400 nm. The fracture toughness (K IC ) and bending strength (r b ) of the nanostructured Al 2 O 3 -TiN composites reached 4.2270.20 MPa . m 1/2 and 746728 MPa, respectively.

show abstract

Section: Results and Dicussioncontrasting

confidence: 43%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel Fabrication Route to Al₂O₃–TiN Nanocomposites Via Spark Plasma Sintering

Wang

et al. 2006

Journal of the American Ceramic Society

View full text Add to dashboard Cite

show abstract

“…A lot of research-papers concerning on Al 2 O 3 /TiN composite materials have been published, and many of them treated the sintering of mixtures of Al 2 O 3 and TiN powders [2][3][4]. In general, TiN powders commercially available consist of large particles because TiN cannot be crushed into fine powders with a conventional milling process due to its excellent high hardness.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of TiN Particle-Dispersed Al2O3 Composites Utilizing High N2-Pressure SHS

et al. 2011

View full text Add to dashboard Cite

Fabrication of fine TiN particle-dispersed dense Al2O3 composites with the compositions of Al2O3/TiN=100/0~90/10 vol% has been conducted from Al2O3/(Ti,TiN0.3) mixed powder compacts by capsule-free hot isostatic pressing (HIP) utilizing high-pressure N2 SHS. Fine Ti powders (φ ~ 0.3 μm) with TiN0.3 phase were prepared by thermal decomposition of planetary ball-milled fine TiH2 powders at 400°C (673 K) for 1 h in a vacuum, followed by heating in N2 at 200 °C (473 K) for 2 h. The Al2O3 powder compacts (relative densities of 57.2-57.8%) with homogeneously dispersed (Ti,TiN0.3) particles were prepared. The mixed powder compacts were hot isostatically pressed (HIPed) under the conditions of 1350°C (1623 K) at 7 MPa N2 for 1 h, followed by the heating at the same temperature for 2 h under 196 MPa-N2. At the first stage of heating [1350°C (1623K)/7MPa/1h], solid/gas reaction of SHS between (Ti,TiN0.3) and N2 was introduced to form TiN and densification of the Al2O3 powder compacts up to the relative density of 92-93% with closed pores was performed. And at the sequent second stage [1350 °C (1623K)/196MPa/2h], densification of the most of pre-sintered composites consisting of Al2O3 and TiN reached higher relative densities than 98.5%. Dispersion of TiN particles (~φ 0.30 μm) in the composites suppressed the grain growth of Al2O3 during HIP-sintering. Mechanical properties, such as bending strength (σb), Vickers hardness (HV), fracture toughness (K1C), and electrical resistivity (ρ) of the composites were evaluated as a function of TiN content; the maximum values of σb=640 MPa, HV=19.5 GPa, and KIC=4.5 MPa・m1/2 were obtained in the Al2O3/TiN=97/3~95/5 vol% composites. Among the composites, the lowest ρ value of 2.6×103 Ω・m was attained at Al2O3/TiN=90/10 vol% composite.

show abstract

“…This work grew out of studies on displacement reactions involving Fe + NiO and Cu + NiO, among other reactions [6,[8][9][10]. Other researchers [11][12][13][14][15][16] have used a similar approach, termed reaction sintering, as a method of synthesizing ceramic composites, but with limited success in producing high-quality structural materials. An example of a ceramic composite produced from reaction sintering is t-ZrO2 + mullite from ZrSiO4 + alumina [12].…”

mentioning

confidence: 99%

Structure and properties of composites synthesized in situ using solid state displacement reactions

Henager¹,

Brimhall²

1993

View full text Add to dashboard Cite

1111 _, UU]_ [[[ll _ lUll-_ ulu-_ q I J AbstractSolid state displacement reactions can produce in situ intermetallic and ceramic matrix composites in a process where an intermetallic or ceramic phase(s) and a potential reinforcing phase(s) are grown together during a solid state reaction. Interpenetrating and dispersed microstructures, important for desirable composite properties, have been produced by means of displacement reaction processing techniques. Two such composites have been synthesized which exhibit two distinct microstructures: MoSi2 reinforced with SiC particles, which exhibits a dispersed-phase structure, and NiA1/Ni3A1 reinforced with A1203, which exhibits an interpenetrating-phase structure. Strength in bending and chevron-notch fracture toughness have been determined as a function of temperature, and measured properties compare favorably with composites produced by other means.The measured properties are discussed with regard to the observed microstructures. The potential for displacement reaction processing is assessed, and it appears to be a cost-effective synthesis method compared to others.

show abstract

Chemical and microstructural investigations of high-temperature interactions between AlN and TiO2

Cited by 27 publications

References 5 publications

Novel Fabrication Route to Al₂O₃–TiN Nanocomposites Via Spark Plasma Sintering

Novel Fabrication Route to Al₂O₃–TiN Nanocomposites Via Spark Plasma Sintering

Fabrication of TiN Particle-Dispersed Al2O3 Composites Utilizing High N2-Pressure SHS

Structure and properties of composites synthesized in situ using solid state displacement reactions

Contact Info

Product

Resources

About

Chemical and microstructural investigations of high-temperature interactions between AlN and TiO2

Cited by 27 publications

References 5 publications

Novel Fabrication Route to Al2O3–TiN Nanocomposites Via Spark Plasma Sintering

Novel Fabrication Route to Al2O3–TiN Nanocomposites Via Spark Plasma Sintering

Fabrication of TiN Particle-Dispersed Al2O3 Composites Utilizing High N2-Pressure SHS

Structure and properties of composites synthesized in situ using solid state displacement reactions

Contact Info

Product

Resources

About

Novel Fabrication Route to Al₂O₃–TiN Nanocomposites Via Spark Plasma Sintering

Novel Fabrication Route to Al₂O₃–TiN Nanocomposites Via Spark Plasma Sintering