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Research Papers: Coatings and Solid Lubricants

In Situ Synthesis of Fe–TiC Nanocomposite Coating on CK45 Steel From Ilmenite Concentrate by Plasma-Spray Method

[+] Author and Article Information
Alireza Firouzbakht

Department of Ceramic,
Materials and Energy Research Center (MERC),
Tehran 14155-4777, Iran
e-mail: alireza_f_1988@yahoo.com

Mansour Razavi

Department of Ceramic,
Materials and Energy Research Center (MERC),
Tehran 14155-4777, Iran
e-mail: m7816006@yahoo.com

Mohammad Reza Rahimipour

Department of Ceramic,
Materials and Energy Research Center (MERC),
Tehran 14155-4777, Iran
e-mail: Rahimi40@yahoo.com

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received December 8, 2015; final manuscript received March 5, 2016; published online July 20, 2016. Assoc. Editor: Robert Wood.

J. Tribol 139(1), 011302 (Jul 20, 2016) (9 pages) Paper No: TRIB-15-1441; doi: 10.1115/1.4033190 History: Received December 08, 2015; Revised March 05, 2016

These days wear-resistant coatings including Fe–TiC composites because of their properties such as high melting point, hardness, and wear resistance are used in different fields such as aerospace, transport, cutting, and abrasive. In situ synthesis of Fe–TiC nanocomposite as a wear-resistant coating by the plasma-spray process is the purpose of this study. Ilmenite concentrate and carbon black were used as raw materials. Three kinds of powders with different conditions were prepared and sprayed on CK45 steel substrates in constant conditions. Microstructure, phase identification, wear resistance, and hardness of coated samples were determined. The results showed that activated sample was synthesized during the plasma spray, but in situ synthesize did not happen for inactive sample which was sprayed by plasma spray. Also, wear resistance and hardness tests showed by synthesis of Fe–TiC composite in coated samples, wear resistance, and hardness were increased.

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References

Figures

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Fig. 1

Morphologies of the (a) FeTiO3 and (b) carbon black

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Fig. 2

X-ray diffraction patterns of raw materials mixtures (FeTiO3 = •)

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Fig. 3

X-ray diffraction patterns of (a) S1 powder, (b) S2 powder, and (c) S3 powder (FeTiO3 = •, Fe = Δ, and TiC = ▪)

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Fig. 4

X-ray diffraction patterns of (a) coated sample by S1 powder, (b) coated sample with S2 powder, and (c) coated sample with S3 powder (TiC = ▪, Fe(α) = Δ, Fe(γ) = *, Fe2O3 = ○, TiO2 = □, FeTiO3 = •, and FeO = ♦)

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Fig. 5

Gibbs free energy–temperature diagram of FeTiO3, FeO, and TiO2 [15]

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Fig. 6

Cross section morphology and linear EDS analysis of coated samples with S1 powder

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Fig. 7

Cross section morphology and linear EDS analysis of coated samples with S2 powder

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Fig. 8

Cross section morphology and linear EDS analysis of coated samples with S3 powder

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Fig. 9

OM images of coating's surface by (a) S1 powder, (b) S2 powder, and (c) S3 powder

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Fig. 10

Weight loss of C1, C2, and C3 samples in wear-resistant test

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