Boron – Nitrogen – Titanium

Томашик, В. М.

doi:10.1007/978-3-642-02700-0_7

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…Close examination of the reported behavior of the Ti–B–N ternary system reveals a disagreement over the absence or presence of ternary phases and solid solutions. Despite several studies reporting the solubility limit of B in TiN 1– x as approximately of only 1 atomic % and zero solubility of nitrogen in TiB 2 , − authors have reported the preparation of solid solutions of TiN containing a wide range of B concentrations − and have even claimed the presence of a ternary phase . Additional TEM investigations of multilayer films showed regions containing all three elements, Ti, B, and N .…”

Section: Discussionmentioning

confidence: 99%

Mechanisms of Self-Sustained Reaction in Mechanically Induced Nanocomposites: Titanium Nitride and Boron

2019

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We report the results from the investigation of the mechanisms of self-sustained reaction in mechanically induced TiN/B nanocomposites. The exothermic displacement reaction, 3B + TiN → BN + TiB2, with an adiabatic reaction temperature of 1905 K, was initiated through two different means: localized thermal heating and mechanical stimulation by high-energy ball milling. Comprehensive studies strongly indicate that the chemical interaction in the system involves three main stages. Solid-state mass transfer, likely the substitutional diffusion of B into a nitrogen deficient TiN x crystal lattice, is responsible for the formation of TiB2 during the first stage of the reaction (1350–1500 K) under ambient pressure. Thermal gravimetric analysis coupled with mass spectrometry demonstrated the evolution of gas phase nitrogen from TiN during an intermediate stage of the reaction in the temperature range of 1500–1800 K. Electron microscopy results show the formation of h-BN along the pores present in the initial composite, thus indicating reaction of gaseous nitrogen with boron during the final reaction stage. In addition, propagation characteristics of an oscillatory spin combustion regime in the TiN–3B system were analyzed using high-speed infrared imaging, which suggest a strongly nonlinear spin combustion mode.

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Section: Discussionmentioning

confidence: 99%

Mechanisms of Self-Sustained Reaction in Mechanically Induced Nanocomposites: Titanium Nitride and Boron

2019

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“…Especially, Chen and Sundman achieved a quite complete modeling up to 2500 C showing the evolution of the stability of these ternary compounds with temperature and establishing a thermodynamical database with a good reliability compared to experiments [15]. The pseudobinary diagram of the Ti-Al-N system is shown Figure 2 [16]. It is clearly shown that mixing of AlN and TiN results in a biphased domain composed of the stable fcc-TiN and hcp-AlN on the entire range of composition.…”

Section: Stable Diagrammentioning

confidence: 95%

Ti-Al-N-Based Hard Coatings: Thermodynamical Background, CVD Deposition, and Properties. A Review

Uny¹,

Blanquet²,

Schuster³

et al. 2019

Coatings and Thin-Film Technologies

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For several decades, the increasing productivity in many industrial domains has led to a significant and ever-increased interest to protective and hard coatings. In this context, titanium-aluminum nitrides were developed and are now widely used in a large range of applications, due to their high hardness, good thermal stability, and oxidation resistance. This chapter reviews the thermodynamical characteristics of the Ti-Al-N system by reporting the progress made in the description of the Ti-Al-N phase diagram and the main mechanical and chemical properties of Ti 1Àx Al x N-based coatings. As a metastable phase, the existence of the fcc-Ti 1Àx Al x N depends on particular process parameters, allowing stabilizing this desirable solid solution. The influence of process parameters, with a particular interest for chemical vapor deposition (CVD) methods, on morphology and crystallographic structure is then described. The structure of Ti 1Àx Al x N thin films depends also on the aluminum content as well as on the annealing temperature, due to the spinodal nature of the Ti-Al-N system. These changes of crystallographic structure can induce an improvement of the hardness, oxidation resistance, and wear behavior of these coatings. The main mechanical and chemical properties of physical vapor deposition (PVD) and CVD Ti 1Àx Al x N-based coatings are also described.

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Boron – Nitrogen – Titanium

Cited by 2 publications

References 13 publications

Mechanisms of Self-Sustained Reaction in Mechanically Induced Nanocomposites: Titanium Nitride and Boron

Mechanisms of Self-Sustained Reaction in Mechanically Induced Nanocomposites: Titanium Nitride and Boron

Ti-Al-N-Based Hard Coatings: Thermodynamical Background, CVD Deposition, and Properties. A Review

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