Synthesis of hard nano-structured metal matrix composite boride coatings using combined laser and sol-gel technology

A. Roy Choudhury; Tamer Ezz; Lin Li

doi:10.1016/j.msea.2006.09.020

Synthesis of hard nano-structured metal matrix composite boride coatings using combined laser and sol-gel technology

A. Roy Choudhury, Tamer Ezz, Lin Li

Research output: Contribution to journal › Article › peer-review

Abstract

This paper reports the synthesis of nano-structured boride metal matrix composite (MMC) coatings obtained by laser melting of a pre-placed mixture of B4C + Ti-6Al-4V powders and sol-gel derived nano-particulate Ti(OH)4. The resulting nano-composite coatings have been characterised in terms of microhardness, microstructure and constituent phase composition. The coatings show evidence of micro-level FeB phases and nano-particulate TiB phases in a (Fe + Fe2B) matrix. One form of the nano-particulate TiB phase is formed in situ as rosettes as a result of dendritic bending while the other form is of irregular shape. The wear resistance of the hardest coating has been tested at 30 mm/s sliding speed and normal loads of 10, 20, 30 and 40 N under dry conditions. The wear resistance of the coating material shows a 17-fold increase compared to that of the EN43 steel substrate material and comparable or better than most reported work. Reduction of Ti-6Al-4V content in the pre-placed powder mixture does not substantially affect the hardness and wear resistance of the coating. © 2006 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	193-202
Number of pages	9
Journal	Materials Science and Engineering A
Volume	445-446
DOIs	https://doi.org/10.1016/j.msea.2006.09.020
Publication status	Published - 15 Feb 2007

Keywords

Laser
MMC
Nano-composite
Sol-gel
Synthesis

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LPRC: Laser Processing Research Centre Impact
Allegre, O. (PI), Crosby, D. (PI), Domingos, M. (PI), Francis, J. (PI), Gillen, D. (PI), Guo, W. (PI), Li, L. (PI), Mativenga, P. (PI), Rogers, B. D. (PI), Whitehead, D. (PI), Wilson, D. (PI), Zhong, S. (PI), Mirhosseini, N. (Researcher), Ouyang, J. (Researcher), Huang, Y. (Researcher), Wei, C. (Researcher), Cheng, D. (PGR student), Suryo Pratomo, E. (PGR student), Zhang, Z. (PGR student), Li, Z. (PGR student), Mo, H. (PGR student), Zhu, M. (PGR student), Li, Q. (PGR student), Liu, W. (PGR student), Wang, L. (PGR student), Guo, H. (PGR student), Heinemann, R. (PI) & Liu, Z. (PI)
1/04/00 → …
Project: Research

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@article{ed6776b72583439fb93a548b01b2b91d,

title = "Synthesis of hard nano-structured metal matrix composite boride coatings using combined laser and sol-gel technology",

abstract = "This paper reports the synthesis of nano-structured boride metal matrix composite (MMC) coatings obtained by laser melting of a pre-placed mixture of B4C + Ti-6Al-4V powders and sol-gel derived nano-particulate Ti(OH)4. The resulting nano-composite coatings have been characterised in terms of microhardness, microstructure and constituent phase composition. The coatings show evidence of micro-level FeB phases and nano-particulate TiB phases in a (Fe + Fe2B) matrix. One form of the nano-particulate TiB phase is formed in situ as rosettes as a result of dendritic bending while the other form is of irregular shape. The wear resistance of the hardest coating has been tested at 30 mm/s sliding speed and normal loads of 10, 20, 30 and 40 N under dry conditions. The wear resistance of the coating material shows a 17-fold increase compared to that of the EN43 steel substrate material and comparable or better than most reported work. Reduction of Ti-6Al-4V content in the pre-placed powder mixture does not substantially affect the hardness and wear resistance of the coating. {\textcopyright} 2006 Elsevier B.V. All rights reserved.",

keywords = "Laser, MMC, Nano-composite, Sol-gel, Synthesis",

author = "Choudhury, \{A. Roy\} and Tamer Ezz and Lin Li",

year = "2007",

month = feb,

day = "15",

doi = "10.1016/j.msea.2006.09.020",

language = "English",

volume = "445-446",

pages = "193--202",

journal = "Materials Science and Engineering A",

issn = "0921-5093",

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TY - JOUR

T1 - Synthesis of hard nano-structured metal matrix composite boride coatings using combined laser and sol-gel technology

AU - Choudhury, A. Roy

AU - Ezz, Tamer

AU - Li, Lin

PY - 2007/2/15

Y1 - 2007/2/15

N2 - This paper reports the synthesis of nano-structured boride metal matrix composite (MMC) coatings obtained by laser melting of a pre-placed mixture of B4C + Ti-6Al-4V powders and sol-gel derived nano-particulate Ti(OH)4. The resulting nano-composite coatings have been characterised in terms of microhardness, microstructure and constituent phase composition. The coatings show evidence of micro-level FeB phases and nano-particulate TiB phases in a (Fe + Fe2B) matrix. One form of the nano-particulate TiB phase is formed in situ as rosettes as a result of dendritic bending while the other form is of irregular shape. The wear resistance of the hardest coating has been tested at 30 mm/s sliding speed and normal loads of 10, 20, 30 and 40 N under dry conditions. The wear resistance of the coating material shows a 17-fold increase compared to that of the EN43 steel substrate material and comparable or better than most reported work. Reduction of Ti-6Al-4V content in the pre-placed powder mixture does not substantially affect the hardness and wear resistance of the coating. © 2006 Elsevier B.V. All rights reserved.

AB - This paper reports the synthesis of nano-structured boride metal matrix composite (MMC) coatings obtained by laser melting of a pre-placed mixture of B4C + Ti-6Al-4V powders and sol-gel derived nano-particulate Ti(OH)4. The resulting nano-composite coatings have been characterised in terms of microhardness, microstructure and constituent phase composition. The coatings show evidence of micro-level FeB phases and nano-particulate TiB phases in a (Fe + Fe2B) matrix. One form of the nano-particulate TiB phase is formed in situ as rosettes as a result of dendritic bending while the other form is of irregular shape. The wear resistance of the hardest coating has been tested at 30 mm/s sliding speed and normal loads of 10, 20, 30 and 40 N under dry conditions. The wear resistance of the coating material shows a 17-fold increase compared to that of the EN43 steel substrate material and comparable or better than most reported work. Reduction of Ti-6Al-4V content in the pre-placed powder mixture does not substantially affect the hardness and wear resistance of the coating. © 2006 Elsevier B.V. All rights reserved.

KW - Laser

KW - MMC

KW - Nano-composite

KW - Sol-gel

KW - Synthesis

U2 - 10.1016/j.msea.2006.09.020

DO - 10.1016/j.msea.2006.09.020

M3 - Article

SN - 0921-5093

VL - 445-446

SP - 193

EP - 202

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

ER -

Synthesis of hard nano-structured metal matrix composite boride coatings using combined laser and sol-gel technology

Abstract

Keywords

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LPRC: Laser Processing Research Centre Impact

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