The exceptional oxidation of Ti6Al4V alloy with a pre-deposited silver layer

Zhang, Zhenxue; Zhang, Yuejiao; Tao, Xiao; Liu, Ke; Burns, Andrew; Li, Peize; Mukinay, Tatiana; Li, Xiaoying; Dong, Hanshan

doi:10.1016/j.jallcom.2021.163574

Cited by 4 publications

(2 citation statements)

References 34 publications

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“…However, this process normally needs more than 100 h of treatment at 600-700 • C to form a hard and wear-resistant titanium oxide layer. Recently, we developed a fast CCT by pre-depositing a metal layer like gold or silver to accelerate the CCT of commercial pure titanium (CPTi) and Ti6Al4V to shorten the treatment time to a few hours to save energy [19,20]. Thanks to its frictional properties and long-term stability, gold is well-known as one of the most encouraging solid lubricants [21].…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of the Fast Ceramic Conversion Treated Ti-6Al-2Sn-4Zr-2Mo Alloy with a Pre-Deposited Gold Layer

Zhang,

Xiao,

Liu

et al. 2024

Lubricants

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Ceramic conversion treatment (CCT) is an effective way to modify the surface of titanium alloys. However, this process normally needs more than a 100-h treatment at 600–700 °C to form a hard and wear-resistant titanium oxide layer. In this paper, we pre-deposited a thin gold layer on the surface of Ti-6Al-2Sn-4Zr-2Mo (Ti6242) samples before CCT to investigate if Au can speed up the treatment. Treatments at 640/670/700 °C were carried out for 10 or 120 h. After CCT, the surface roughness, surface morphology, microstructure, elemental composition, and phase constituents were characterized. Surface hardness and the nano-hardness depth distribution were measured. Finally, reciprocating sliding tribological tests were carried out to study the friction and wear of the surface layers. Thin gold layers accelerated the CCT significantly with a much thicker oxide layer. The friction of the untreated Ti6242 alloy against the WC ball was unsteady and high, but it was much lower and stable for the CCTed samples pre-deposited with Au because of the formation of titanium oxides and lubrication effect of the gold particles. The wear resistance of the CCTed Ti6242 alloy samples with gold was reinforced significantly. By pre-depositing a thin gold layer on the surface of Ti6242, the treatment time can be cut significantly, and CCT becomes more efficient.

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Section: Introductionmentioning

confidence: 99%

Tribological Properties of the Fast Ceramic Conversion Treated Ti-6Al-2Sn-4Zr-2Mo Alloy with a Pre-Deposited Gold Layer

Zhang,

Xiao,

Liu

et al. 2024

Lubricants

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“…Ceramic conversion treatment (CCT) is an environmentally friendly and low-cost technique that aims to improve the tribological properties of titanium alloys by forming a thin and compact oxide layer supported by a diffusion zone [1,7]. Recently, fast CCT was developed to shorten the treatment time and save energy by pre-depositing a metal layer like gold or silver to accelerate the process [8,9]. Vanadium (V) is a β stabilizer in titanium alloys.…”

Section: Introductionmentioning

confidence: 99%

Ceramic Conversion Treatment of Commercial Pure Titanium with a Pre-Deposited Vanadium Layer

Zhang,

Deng,

Dong

2023

Metals

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Titanium is characterized by poor wear resistance which restricts its application. Ceramic conversion treatment (CCT) is used to modify the surface; however, it is a time-consuming process. In this work, a thin vanadium layer was pre-deposited on the commercial pure titanium (CPTi) samples’ surface, and it increased the oxygen absorption significantly and assisted in obtaining a much thicker oxide layer than those samples without a V layer at the treatment temperatures of 620 °C and 660 °C. The oxidation of the samples pre-deposited with the V layer had a much higher oxidation rate, and V was evenly distributed in the oxide layer. After CCT, all samples had a low wear volume and stable coefficient of friction in comparison to the untreated CPTi sample. A slightly higher wear area in the wear track was observed on the V pre-deposited samples than those samples without vanadium, especially those with a thicker oxide layer (>4 µm). This might be associated with defects in a thicker oxide layer and insufficient support from a shallower oxygen diffusion zone or hard debris created at the initial stage. Vanadium in the oxide layer reduced the contact angles of the surface and increased the wettability significantly.

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Flat Absorber Black PEO coatings on Ti6Al4V for spacecraft thermal control application

Madhuri

Ghosh

Hasan

et al. 2022

Ceramics International

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The exceptional oxidation of Ti6Al4V alloy with a pre-deposited silver layer

Cited by 4 publications

References 34 publications

Tribological Properties of the Fast Ceramic Conversion Treated Ti-6Al-2Sn-4Zr-2Mo Alloy with a Pre-Deposited Gold Layer

Tribological Properties of the Fast Ceramic Conversion Treated Ti-6Al-2Sn-4Zr-2Mo Alloy with a Pre-Deposited Gold Layer

Ceramic Conversion Treatment of Commercial Pure Titanium with a Pre-Deposited Vanadium Layer

Flat Absorber Black PEO coatings on Ti6Al4V for spacecraft thermal control application

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