Synthesis of amorphous coating by laser cladding multi-layer Co-based self-fluxed alloy powder

Shu, Fengyuan; Tian, Ze; Zhao, Hongyun; He, Wenxiong; Sui, Shaohua; Liu, Bin

doi:10.1016/j.matlet.2016.04.118

Cited by 40 publications

(10 citation statements)

References 11 publications

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“…When the surface of calcium-phosphate is directed to water and certain level of temperature, it forms bioactive phase (hydroxyapatite) [55]. These biodegradable are not stable at high temperatures which limits fabricating them into biomedical implants [65].…”

Section: Bioceramics Bioceramics Bioceramics Bioceramicsmentioning

confidence: 99%

See 1 more Smart Citation

Biomedical materials and techniques to improve the tribological, mechanical and biomedical properties of orthopedic implants – A review article

Ibrahim

Sarhan

Yusuf

et al. 2017

Journal of Alloys and Compounds

275

100

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Section: Bioceramics Bioceramics Bioceramics Bioceramicsmentioning

confidence: 99%

“…The coating material is usually in powder form which may be preplaced [115] over the substrate surface or injected under pressure [65] or gravity [116]. Laser beam melts the powder -the process involves rapid heating and cooling -and creates melt pool without melting the substrate.…”

Section: Laser Cladding Laser Cladding Laser Cladding Laser Cladding mentioning

confidence: 99%

Biomedical materials and techniques to improve the tribological, mechanical and biomedical properties of orthopedic implants – A review article

Ibrahim

Sarhan

Yusuf

et al. 2017

Journal of Alloys and Compounds

275

100

View full text Add to dashboard Cite

“…Поэтому важным критерием работоспособности покрытий является их способность выдерживать контактные нагрузки [9], которую, как правило, оценивают по характеру разрушения после однократного или повторяющегося (циклического) нагружения поверхности инденторами различной формы [10 -23]. В отличие от стеллитов, в литературе имеется не так много работ, посвященных исследованию структуры и свойств кобальтхромоникелевых покрытий из сплавов систем CoNiCrBSi [24] и CoNiCrW [25 -28]. При этом практически отсутствуют работы по исследованию возможности неразрушающего контроля структурного состояния и свойств таких покрытий [27].…”

Section: Introductionunclassified

Features of eddy-current testing of the fatigue degradation of laser clad cobalt-nickel-chromium coating under contact loading

et al. 2020

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The fatigue spalling due to contact stresses is one of the main types of failure of the surface protective coatings. Therefore, an important task is to study the contact endurance and to develop nondestructive techniques for testing of the fatigue degradation of such coatings. The possibility of using the eddy-current technique to test the fatigue degradation under contact loading of the cobalt-nickel-chromium PG-10K-01 coating obtained through a gas-powder laser cladding has been investigated. It has been shown that the eddy-current testing of the fatigue degradation under contact loading of the PG-10K-01 coating is possible, but has certain limitations due to non-monotonic changes in the eddy-current device readings α depending on the number of loading cycles. While on the one hand, it is possible to test a sharp increase in the size of contact damages, which, under the used loading conditions, occurs after 5 ×10 4 and 5 ×10 5 cycles and results from the formation of a large number of peripheral ring cracks in the failure zone and the corresponding decrease in the value of α due to the increasing resistivity of the coating. On the other hand, it is possible to test the achievement of a certain number of loading cycles in the range of 8 ×10 5-1×10 6 , when the eddy-current device readings exceed the initial values. This increase in the value of α is caused by the compaction of the coating as a result of healing of discontinuities and a decrease in its resistivity. The testing can be performed by measuring the eddy-current device readings at high excitation frequencies of the-eddy current probe f = 72-120 kHz. In this case, the impact of the ferromagnetic steel base on the eddy-current device readings is minimal and mainly surface layers are analyzed, where the processes of crack formation, mechanical hardening, and compaction that affect the physical characteristics of the coating are developed more intensively.

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“…Since Yoshioka et al [11] successfully deposited a Ni-Cr-P-B amorphous coating by laser cladding on low carbon steel in 1975, different types of amorphous alloy coatings have been prepared by laser cladding such as Zr-based, Ni-based, Cu-based, Al-based, Co-based, etc. [12,13,14,15,16]. Compared with the above amorphous alloy systems, Fe-based amorphous coatings have comparable mechanical properties but a much lower cost [17], and therefore have great potential in engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Influence of Scanning Speed on Microstructure and Properties of Laser Cladded Fe-Based Amorphous Coatings

Hou

Chang

et al. 2019

Materials

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Fe-based amorphous alloys with excellent mechanical properties are suitable for preparing wear resistant coatings by laser cladding. In this study, a novel Fe-based amorphous coating was prepared by laser cladding on 3Cr13 stainless steel substrates. The influence of scanning speeds on the microstructures and properties of the coatings was investigated. The microstructure compositions and phases were analyzed by scanning electron microscope, electron probe microanalyzer, and x-ray diffraction respectively. Results showed that the microstructures of the coatings changed significantly with the increase of scanning speeds. For a scanning speed of 6 mm/s, the cladding layer was a mixture of amorphous and crystalline regions. For a scanning speed of 8 mm/s, the cladding layer was mainly composed of block grain structures. For a scanning speed of 10 mm/s, the cladding layer was composed entirely of dendrites. Different dilution rates at the bonding zones were the main reasons for the microstructure change for different claddings. For all three scanning speeds, the coatings had higher hardness and wear resistance when compared with the substrate; as the scanning speed increased, the hardness and wear resistance of the coatings gradually decreased due to the change in microstructure.

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Synthesis of amorphous coating by laser cladding multi-layer Co-based self-fluxed alloy powder

Cited by 40 publications

References 11 publications

Biomedical materials and techniques to improve the tribological, mechanical and biomedical properties of orthopedic implants – A review article

Biomedical materials and techniques to improve the tribological, mechanical and biomedical properties of orthopedic implants – A review article

Features of eddy-current testing of the fatigue degradation of laser clad cobalt-nickel-chromium coating under contact loading

Influence of Scanning Speed on Microstructure and Properties of Laser Cladded Fe-Based Amorphous Coatings

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