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Abstract

The effect of M₂CO₃ (M = Li, Na, K) on electrolytic boronising of titanium in Na₂B₄O₇–20M₂CO₃ was investigated. The phase composition of boride was determined by X-ray diffraction. The morphology of boride was determined by scanning electron microscopy, and the composition of boride was measured by X-ray energy dispersive spectroscopy. The results show that the boride layer comprised TiB₂ and TiB. TiB₂ presented a dense phase, whereas TiB presented whiskers. TiB₂ became thicker in the order of Li₂CO₃, Na₂CO₃ and K₂CO₃, in the melts. Simultaneously, TiB whiskers gradually changed from short and thick to long and thin. This change was due to the different polarisation abilities of alkali metal ions in M₂CO₃ (M = Li, Na, K).

Keywords

Titanium Boronising Carbonate TiB

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References

Dong

, Bloyce

, Morton

P. H.

and Bell

: ‘Surface engineering to improve tribological performance of Ti–6Al–4V’, Surf. Eng., 1997, 13, 402–406.

Premkumar

, Himabindu

V. S.

, Banumathy

, Bhattacharjee

and Singh

A. K.

: ‘Effect of mode of deformation by rolling on texture evolution and yield locus anisotropy in a multifunctional β titanium alloy’, Mater. Sci. Eng. A, 2012, A552, 15–23.

Tang

C. -B.

, Liu

D. -X.

, Wang

and Gao

: ‘Electro-spark alloying using graphite electrode on titanium alloy surface for biomedical applications’, Appl. Surf. Sci., 2011, 257, 6364–6371.

Guo

, Zhou

J. S.

, Zhou

J. R.

, Guo

B. G.

, Yu

Y. J.

, Zhou

H. D.

and Chen

J. M.

: ‘Microstructure and friction and wear behavior of laser boronizing composite coatings on titanium substrate’, Appl. Surf. Sci., 2011, 257, 4398–4405.

Poondla

, Srivatsan

T. S.

, Patnaik

and Petraroli

: ‘A study of the microstructure and hardness of two titanium alloys: commercially pure and Ti–6Al–4V’, J. Alloys Compd, 2009, 486, 162–167.

Derek King

, William

G. F.

and Greg

E. H.

: ‘Microstructural effects on the mechanical properties of SiC–15 vol% TiB₂ particulate-reinforced ceramic composites’, J. Am. Ceram. Soc., 2013, 96, 577–583.

Zhang

Z. G.

, Qin

J. N.

, Zhang

Z. W.

, Chen

Y. F.

, Lu

W. J.

and Zhang

: ‘Microstructure effect on mechanical properties of in situ synthesized titanium matrix composites reinforced with TiB and La₂O₃’, Mater. Lett., 2010, 64, 361–363.

Wang

X. B.

, Zhang

P. P.

, Xiao

and Cai

L. J.

: ‘Metallurgical model of in situ synthesised TiB₂/Fe composite coatings during PTA process’, Surf. Eng., 2012, 28, 11–16.

Guo

, Zhou

J. S.

, Zhao

J. R.

, Guo

B. G.

, Yu

Y. J.

, Zhou

H. D.

and Chen

J. M.

: ‘Microstructure and friction and wear behavior of laser boronizing composite coatings on titanium substrate’, Appl. Surf. Sci., 2011, 257, 4398–4405.

10.

Aich

and Ravi Chandran

K. S.

: ‘TiB whisker coating on titanium surfaces by solid-state diffusion: synthesis, microstructure, and mechanical properties’, Metall. Mater. Trans. A, 2002, 33A, 3489–3498.

11.

Huang

Y. G.

, Ren

M. D.

, Zhao

, Li

Q. Y.

and Wang

H. Q.

: ‘Molten salts boronizing of titanium with Na₂B₄O₇–Al’, Mater. Sci. Eng. Powder Metall., 2012, 17, 182–188.

12.

Kartal

, Timur

, Urgen

and Erdemir

: ‘Electrochemical boriding of titanium for improved mechanical properties’, Surf. Coat. Technol., 2010, 204, 3935–3939.

13.

Fan

, Guo

Z. X.

and Cantor

: ‘The kinetics and mechanism of interfacial reaction in sigma fibre-reinforced Ti MMCs’, Composites Part A, 1997, 28A, 131–140.

14.

Kaptaya

and Kuznetsov

S. A.

: ‘Electrochemical synthesis of refractory borides from molten salts’, Plasmas Ions, 1999, 2, 45–56.

Effects of M 2 CO 3 (M = Li,Na,K) on electrolytic boronising of titanium in Na 2 B 4 O 7 melts

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