Effect of Y2O3 content in the pack mixtures on the cyclic-oxidation of Y2O3-modified low temperature aluminide coatings on 309 stainless steel

Wang, Yongdong; Wang, Jixiao; Hu, Hailong; Meng, Jiao; Zhao, Xin

doi:10.1016/j.vacuum.2018.09.047

Cited by 18 publications

(4 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Application of the diffusion coatings for airfoils was first employed by using the pack cementation technique in the late 1960s [18]. This process is still considered the most widely used method for applying diffusion coatings and the formation mechanism of coating is well-studied [19,20]. Generally, the protection mechanism provided by the diffusion coatings relies on the enrichment of protective alloying elements at the surface of substrate, which leads to the formation of a uniform oxide scale during exposure to harsh conditions at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Development of hybrid electrodeposition/slurry diffusion aluminide coatings on Ni-based superalloy with enhanced hot corrosion resistance

Zakeri

Balashadehi

Rouhaghdam

2021

jcc

View full text Add to dashboard Cite

Ni/Co-modified aluminide coatings were prepared on the Hastelloy-X superalloy by a combined process of electrodeposition and slurry aluminizing. In this regard, pure layers of Ni and Ni-50wt.%Co were initially applied via electrodeposition process and successive aluminization was carried out by a slurry technique. The scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were used for the microstructural and chemical composition characterization of the specimens. The results of these analyses revealed that a compact and dense aluminide coating was formed with a two-layered structure containing the outer Al-rich β phase and inner interdiffusion zone. Moreover, the presence of pre-electrodeposited layers inhibited the outward diffusion flux of elements from the substrate and effectively suppressed the formation of Kirkendall pores. The hot corrosion studies of the obtained coatings indicated that the addition of a pre-electrodeposited layer could enhance the high-temperature corrosion performance of the coatings when exposed to sulfate salt.

show abstract

Section: Introductionmentioning

confidence: 99%

Development of hybrid electrodeposition/slurry diffusion aluminide coatings on Ni-based superalloy with enhanced hot corrosion resistance

Zakeri

Balashadehi

Rouhaghdam

2021

jcc

View full text Add to dashboard Cite

show abstract

“…The main methods of alloy preparation include ingot metallurgy, powder metallurgy, selective laser melting etc. [ 56 ] Among them, arc melting [ 57 , 58 , 59 ] and powder metallurgy are the common methods for preparing alloys. The arc melting method involves introducing a certain percentage of the metal material into a clamp and then, after repeated evacuations, filling the vacuum furnace with protective argon gas.…”

Section: Preparation Techniques and Related Properties Of Cu-doped Ti...mentioning

confidence: 99%

Recent Advances in Copper-Doped Titanium Implants

Zhou

Zeng

et al. 2022

Materials

View full text Add to dashboard Cite

Titanium (Ti) and its alloys have been extensively used as implant materials in clinical practice due to their high corrosion resistance, light weight and excellent biocompatibility. However, the insufficient intrinsic osteogenic capacity of Ti and its alloys impedes bone repair and regeneration, and implant-related infection or inflammation remains the leading cause of implant failure. Bacterial infections or inflammatory diseases constitute severe threats to human health. The physicochemical properties of the material are critical to the success of clinical procedures, and the doping of Cu into Ti implants has been confirmed to be capable of enhancing the bone repair/regeneration, angiogenesis and antibacterial capability. This review outlines the recent advances in the design and preparation of Cu-doped Ti and Ti alloy implants, with a special focus on various methods, including plasma immersion implantation, magnetron sputtering, galvanic deposition, microarc oxidation and sol-gel synthesis. More importantly, the antibacterial and mechanical properties as well as the corrosion resistance and biocompatibility of Cu-doped Ti implants from different methods are systematically reviewed, and their prospects and limitations are also discussed.

show abstract

“…The modified aluminide coatings improve the gas turbine performance by increasing turbine inlet temperature (TIT) and prolong the time between overhauls (TBO) of them [20,21]. Conventional aluminide coatings have been modified by adding beneficial elements such as chromium, silicon, cobalt, and platinum [17,[22][23][24][25] or by doping reactive elements (REs), e.g., hafnium, zirconium, cerium, lanthanum, yttrium, and other REs by using numerous techniques such as pack cementation, chemical vapor deposition (CVD), slurry, or co-diffusion methods [26][27][28][29][30][31][32][33][34]. Nonetheless, the addition of silicon into conventional aluminide coatings enhances the resistance against carburization, hot corrosion, and high-temperature oxidation [16,35,36].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Cyclic Oxidation Resistance of Ce-Si Modified Aluminide Coating Deposited by Pack Cementation on Inconel 738LC

Nourpoor¹,

Javadian²,

Rouhaghdam³

et al. 2022

Preprint

View full text Add to dashboard Cite

The synergistic effect of silicon and cerium addition on the oxidation resistance of pack cementation aluminide coating applied on Ni-based superalloy substrate was investigated. The effect of cerium and silicon on the scale morphology, oxidation behavior, and scale spallation tendency are discussed based on the experimental results, using X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray analyses (EDX). In addition, the oxidation resistance was evaluated by measuring the weight of samples after each 16-hour cycle at 1100˚C for 50 cycles. The experiments indicated that silicon addition to aluminide coating improves the oxidation resistance through the formation of β-NiAl1-nSin and δ-Ni2Al3-nSin and δ-Ni2Si phases. Furthermore, the addition of 1% cerium to modified aluminide enhances the formation of the fine-grained microstructure of the β-NiAl and δ-Ni2Al3 and reduces the outward/inward diffusion of elements (so-called blocking effect) which significantly modifies the hot oxidation resistance. The addition of 2% cerium, owing to the distortion of the β-NiAl and δ-Ni2Al3 phases, strictly decreases the hot oxidation resistance and the coating is exfoliated after 450 h at 1100 °C. The cyclic oxidation tests showed that the samples containing 1% cerium and 6% silicon possess the highest hot oxidation resistance in which 2 mg/cm2 weight loss of Ce-Si-aluminide was reported after 800 h. This is attributed to the simultaneous effect of cerium and silicon during the deposition process which reduces the oxygen diffusion and reduces the growth rate of α-Al2O3 during oxidation tests. The α-Al2O3 oxidation layer morphology showed that finer grains are formed in samples containing optimum ratios of cerium and silicon which indicates that these elements improve the coating adhesion and oxidation resistance simultaneously.

show abstract

Effect of Y2O3 content in the pack mixtures on the cyclic-oxidation of Y2O3-modified low temperature aluminide coatings on 309 stainless steel

Cited by 18 publications

References 39 publications

Development of hybrid electrodeposition/slurry diffusion aluminide coatings on Ni-based superalloy with enhanced hot corrosion resistance

Development of hybrid electrodeposition/slurry diffusion aluminide coatings on Ni-based superalloy with enhanced hot corrosion resistance

Recent Advances in Copper-Doped Titanium Implants

Microstructure and Cyclic Oxidation Resistance of Ce-Si Modified Aluminide Coating Deposited by Pack Cementation on Inconel 738LC

Contact Info

Product

Resources

About