Electrochemical boriding of titanium for improved mechanical properties

Kartal, Gülşah Ekin; Timur, Servet; Ürgen, Mustafa; Erdemir, Ali

doi:10.1016/j.surfcoat.2010.05.021

Cited by 76 publications

(32 citation statements)

References 27 publications

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“…The distance, v, is the location of the (TiB/Ti) interface and k 2 its parabolic growth constant (equation (13)) and the difference (l = v−u) denotes the layer thickness of TiB (equation (14)). v = k 2 t 1/2 (13) with…”

Section: Diffusion Modelmentioning

confidence: 99%

A diffusion model for the titanium borides on pure titanium

Кеддам

Taktak

Taşgetiren

2016

Surface Engineering

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In the present study, commercial pure titanium was successfully plasma paste borided using borax paste at a temperature of 700, 750 and 800°C for 3, 5 and 7 h. The X-ray diffraction and scanning electron microscopy techniques revealed the presence of both TiB 2 top-layer and TiB whiskers sub-layer. The formation rates of the TiB 2 layer and TiB whiskers were found to have a parabolic character at all applied process temperatures. Based on the present Ti borides growth data, correspondent diffusion temperature and time, an analytical diffusion model was used to estimate boron diffusion coefficients and activation energies of the boride phases in a binary multiphase Ti-B system. Depending on the temperature and layer thickness, the activation energies of boron in TiB 2 and TiB phases were determined to be 137.55 ± 0.5 and 55.21 ± 0.5 kJ mol −1 , respectively. These values of boron activation energies for pure titanium were compared to the literature data. Nomenclature t the treatment time (s) C TiB2 up the upper limit of boron content in TiB 2 (=31.10 wt-% B) C TiB2 low the lower limit of boron content in TiB 2 (=30.10 wt-% B) C TiB up the upper limit of boron content in TiB (=18.50 wt-% B) C TiB low the lower limit of boron content in TiB (=18.00 wt-% B) C ads the adsorbed boron concentration in the boride layer (wt-%B). C 0 the boron solubility in the substrate (≈0 wt-%B) u the position of the (TiB 2 /TiB) interface or the TiB 2 layer thickness (µm) v the position of the (TiB/Ti) interface or the total layer thickness (µm) l the layer thickness of TiB (µm) k 1 the parabolic growth constant at the (TiB 2 /TiB) interface k 2 the parabolic growth constant at the (TiB/Ti) interface D TiB2 B the diffusion coefficient of boron in TiB 2 (m 2 s −1 ) D TiB B the diffusion coefficient of boron in TiB (m 2 s −1 )

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Section: Diffusion Modelmentioning

confidence: 99%

A diffusion model for the titanium borides on pure titanium

Кеддам

Taktak

Taşgetiren

2016

Surface Engineering

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“…The characterization of borided titanium and its alloys by using various boriding processes has been evaluated by a number of investigators [11][12][13][14][15]. However, no reference could be cited in the literature concerning titanium boride coatings, on Ti alloys obtained in a plasma paste process.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…These compounds are a group of materials with superior properties such as chemical stability, high hardness, high melting point, good thermal conductivity, and low electrical resistivity [9][10]. Titanium boride layers can be obtained by boriding of titanium and its alloys through diffusion of boron at 700-1100 o C for various methods of boriding, such as boriding in a fluidized bed reactor [11], laser boriding [12], pack boriding [13], electrochemical boriding [14] and plasma assisted boriding [15]. Plasma boriding has some advantages when compared to conventional boriding processes.…”

Section: Introductionmentioning

confidence: 99%

Characteristics and growth kinetics of plasma paste borided Cp–Ti and Ti6Al4V alloy

Ataibis

Taktak

2015

Surface and Coatings Technology

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“…Titanium and its alloys are extensively used in aerospace, marine and chemical industries owing to their intrinsic properties such as high specific strength, excellent corrosion and oxidation resistance [1][2][3]. However, because of their low hardness and poor tribological properties, the application of titanium alloys is severely restricted under severe wear and friction conditions [4][5][6].…”

Section: Introductionmentioning

confidence: 99%