Thin Film Coating

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 7488 Experts worldwide ranked by ideXlab platform

Wan Abu Bakar Wan Abas - One of the best experts on this subject based on the ideXlab platform.

  • ceramic tantalum oxide Thin Film Coating to enhance the corrosion and wear characteristics of ti6al4v alloy
    Journal of Alloys and Compounds, 2016
    Co-Authors: B Rahmati, Ahmed A D Sarhan, Jeffrey W Basirun, Wan Abu Bakar Wan Abas
    Abstract:

    Abstract In this research, an attempt is made to study the corrosion and wear behavior of TaO 2 Thin Film Coating deposited onto Ti 6Al 4V alloy with the highest adhesion (was achieved in the author's previous experiments using Taguchi statistical method) which leads to increase corrosion resistance, decrease debris generation and improve durability. Accordingly, pure tantalum (Ta) was deposited onto Ti 6Al 4V substrate surface as intermetallic layer then to form a TaO 2 Thin Film, Ta was deposited onto the sample surface in the presence of oxygen by using physical vapor deposition magnetron sputtering (PVDMS). Corrosion testing was carried out in fetal bovine serum (FBS). The corrosion test in FBS medium confirmed that the corrosion resistance of the TaO 2 – coated Ti 6Al 4V alloys was significantly higher than the uncoated Ti 6Al 4V substrate due to the decrease in corrosion current density (I corr ) for the coated substrate with high Thin-Film adhesion. Wear testing was carried out on uncoated and coated Ti 6Al 4V substrates in the presence of FBS medium under 15 N load (natural walking load) at 1.09 m/s (simulated medium walking speed). The tests revealed that the specific wear ratio of TaO 2 Coating was significantly lower than the uncoated substrate wear ratio. The average friction coefficients obtained were 0.183 and 0.152 for uncoated substrate and TaO 2 Thin Film Coating, respectively. So, due to the noticeable corrosion and wear resistance characteristics of the TaO 2 Coating, it is suggested for hip joint implant.

  • development of tantalum oxide ta o Thin Film Coating on biomedical ti 6al 4v alloy to enhance mechanical properties and biocompatibility
    Ceramics International, 2016
    Co-Authors: B Rahmati, Ahmed A D Sarhan, E Zalnezhad, Z Kamiab, Ali Dabbagh, Dipankar Choudhury, Wan Abu Bakar Wan Abas
    Abstract:

    Abstract Ti-6Al-4V is widely used for arthroprostheses, particularly in metal-on-metal (MoM) hip joints. In spite of the suitable wear and corrosion resistance, metallic wear particles and metal ion release occur on a large timescale. In addition, metal ion levels in patients' blood and urine often reportedly increase according to clinical data. Neurological disease, inflammatory response and cell necrosis can potentially develop consequently. The aim of this research is to fabricate a Thin, hard Film Coating on Ti-6Al-4V in order to improve mechanical properties, such as the adhesion strength, surface hardness and surface roughness of Ti-6Al-4V, which should lead to substrate biocompatibility mitigation through reduced debris production, ion release and cytotoxicity. Physical vapor deposition (PVD) magnetron sputtering treatment is applied to obtain an enriched tantalum oxide (Ta-O) Thin Film Coating. In this regard, pure tantalum (Ta) as a biocompatible metal is deposited atop Ti-6Al-4V substrate in the presence of oxygen gas and different parameter conditions, including substrate temperature, argon flow rate, oxygen flow rate and DC power. The results indicate that the surface hardness and surface roughness of the Ta-O coated substrate significantly improve compared to uncoated substrate. The adhesion strength between Ta-O Thin Film and substrate is examined using a micro scratch tester, and maximum adhesion of 2500 mN is achieved.

B Rahmati - One of the best experts on this subject based on the ideXlab platform.

  • ceramic tantalum oxide Thin Film Coating to enhance the corrosion and wear characteristics of ti6al4v alloy
    Journal of Alloys and Compounds, 2016
    Co-Authors: B Rahmati, Ahmed A D Sarhan, Jeffrey W Basirun, Wan Abu Bakar Wan Abas
    Abstract:

    Abstract In this research, an attempt is made to study the corrosion and wear behavior of TaO 2 Thin Film Coating deposited onto Ti 6Al 4V alloy with the highest adhesion (was achieved in the author's previous experiments using Taguchi statistical method) which leads to increase corrosion resistance, decrease debris generation and improve durability. Accordingly, pure tantalum (Ta) was deposited onto Ti 6Al 4V substrate surface as intermetallic layer then to form a TaO 2 Thin Film, Ta was deposited onto the sample surface in the presence of oxygen by using physical vapor deposition magnetron sputtering (PVDMS). Corrosion testing was carried out in fetal bovine serum (FBS). The corrosion test in FBS medium confirmed that the corrosion resistance of the TaO 2 – coated Ti 6Al 4V alloys was significantly higher than the uncoated Ti 6Al 4V substrate due to the decrease in corrosion current density (I corr ) for the coated substrate with high Thin-Film adhesion. Wear testing was carried out on uncoated and coated Ti 6Al 4V substrates in the presence of FBS medium under 15 N load (natural walking load) at 1.09 m/s (simulated medium walking speed). The tests revealed that the specific wear ratio of TaO 2 Coating was significantly lower than the uncoated substrate wear ratio. The average friction coefficients obtained were 0.183 and 0.152 for uncoated substrate and TaO 2 Thin Film Coating, respectively. So, due to the noticeable corrosion and wear resistance characteristics of the TaO 2 Coating, it is suggested for hip joint implant.

  • development of tantalum oxide ta o Thin Film Coating on biomedical ti 6al 4v alloy to enhance mechanical properties and biocompatibility
    Ceramics International, 2016
    Co-Authors: B Rahmati, Ahmed A D Sarhan, E Zalnezhad, Z Kamiab, Ali Dabbagh, Dipankar Choudhury, Wan Abu Bakar Wan Abas
    Abstract:

    Abstract Ti-6Al-4V is widely used for arthroprostheses, particularly in metal-on-metal (MoM) hip joints. In spite of the suitable wear and corrosion resistance, metallic wear particles and metal ion release occur on a large timescale. In addition, metal ion levels in patients' blood and urine often reportedly increase according to clinical data. Neurological disease, inflammatory response and cell necrosis can potentially develop consequently. The aim of this research is to fabricate a Thin, hard Film Coating on Ti-6Al-4V in order to improve mechanical properties, such as the adhesion strength, surface hardness and surface roughness of Ti-6Al-4V, which should lead to substrate biocompatibility mitigation through reduced debris production, ion release and cytotoxicity. Physical vapor deposition (PVD) magnetron sputtering treatment is applied to obtain an enriched tantalum oxide (Ta-O) Thin Film Coating. In this regard, pure tantalum (Ta) as a biocompatible metal is deposited atop Ti-6Al-4V substrate in the presence of oxygen gas and different parameter conditions, including substrate temperature, argon flow rate, oxygen flow rate and DC power. The results indicate that the surface hardness and surface roughness of the Ta-O coated substrate significantly improve compared to uncoated substrate. The adhesion strength between Ta-O Thin Film and substrate is examined using a micro scratch tester, and maximum adhesion of 2500 mN is achieved.

Ahmed A D Sarhan - One of the best experts on this subject based on the ideXlab platform.

  • ceramic tantalum oxide Thin Film Coating to enhance the corrosion and wear characteristics of ti6al4v alloy
    Journal of Alloys and Compounds, 2016
    Co-Authors: B Rahmati, Ahmed A D Sarhan, Jeffrey W Basirun, Wan Abu Bakar Wan Abas
    Abstract:

    Abstract In this research, an attempt is made to study the corrosion and wear behavior of TaO 2 Thin Film Coating deposited onto Ti 6Al 4V alloy with the highest adhesion (was achieved in the author's previous experiments using Taguchi statistical method) which leads to increase corrosion resistance, decrease debris generation and improve durability. Accordingly, pure tantalum (Ta) was deposited onto Ti 6Al 4V substrate surface as intermetallic layer then to form a TaO 2 Thin Film, Ta was deposited onto the sample surface in the presence of oxygen by using physical vapor deposition magnetron sputtering (PVDMS). Corrosion testing was carried out in fetal bovine serum (FBS). The corrosion test in FBS medium confirmed that the corrosion resistance of the TaO 2 – coated Ti 6Al 4V alloys was significantly higher than the uncoated Ti 6Al 4V substrate due to the decrease in corrosion current density (I corr ) for the coated substrate with high Thin-Film adhesion. Wear testing was carried out on uncoated and coated Ti 6Al 4V substrates in the presence of FBS medium under 15 N load (natural walking load) at 1.09 m/s (simulated medium walking speed). The tests revealed that the specific wear ratio of TaO 2 Coating was significantly lower than the uncoated substrate wear ratio. The average friction coefficients obtained were 0.183 and 0.152 for uncoated substrate and TaO 2 Thin Film Coating, respectively. So, due to the noticeable corrosion and wear resistance characteristics of the TaO 2 Coating, it is suggested for hip joint implant.

  • development of tantalum oxide ta o Thin Film Coating on biomedical ti 6al 4v alloy to enhance mechanical properties and biocompatibility
    Ceramics International, 2016
    Co-Authors: B Rahmati, Ahmed A D Sarhan, E Zalnezhad, Z Kamiab, Ali Dabbagh, Dipankar Choudhury, Wan Abu Bakar Wan Abas
    Abstract:

    Abstract Ti-6Al-4V is widely used for arthroprostheses, particularly in metal-on-metal (MoM) hip joints. In spite of the suitable wear and corrosion resistance, metallic wear particles and metal ion release occur on a large timescale. In addition, metal ion levels in patients' blood and urine often reportedly increase according to clinical data. Neurological disease, inflammatory response and cell necrosis can potentially develop consequently. The aim of this research is to fabricate a Thin, hard Film Coating on Ti-6Al-4V in order to improve mechanical properties, such as the adhesion strength, surface hardness and surface roughness of Ti-6Al-4V, which should lead to substrate biocompatibility mitigation through reduced debris production, ion release and cytotoxicity. Physical vapor deposition (PVD) magnetron sputtering treatment is applied to obtain an enriched tantalum oxide (Ta-O) Thin Film Coating. In this regard, pure tantalum (Ta) as a biocompatible metal is deposited atop Ti-6Al-4V substrate in the presence of oxygen gas and different parameter conditions, including substrate temperature, argon flow rate, oxygen flow rate and DC power. The results indicate that the surface hardness and surface roughness of the Ta-O coated substrate significantly improve compared to uncoated substrate. The adhesion strength between Ta-O Thin Film and substrate is examined using a micro scratch tester, and maximum adhesion of 2500 mN is achieved.

Chongdu Cho - One of the best experts on this subject based on the ideXlab platform.

  • Study on advanced multilayered magnetostrictive Thin Film Coating techniques for MEMS application
    Journal of Materials Processing Technology, 2008
    Co-Authors: Ho-yin Lee, Chongdu Cho
    Abstract:

    This paper is to investigate the multilayer deposition technique with selective DC magnetron sputtering for the fabrication of partially Film deposited magnetostrictive actuator. The multilayer of this study was consisted of TbDyFe and Ni layers. The magneto-mechanical characteristics of TbDyFe (called as Terfenol-D) and Ni multilayered Thin Films with different thickness ratios of TbDyFe/Ni/TbDyFe (0.2/0.1/0.2, 0.2/0.1/0.1, 0.2/0.1/0.0 ??m) were considered and the magnetostrictive multilayers were deposited on two kinds of micro-multi-body actuator systems to check the size effect. To fabricate the multilayered Film on Si based micro-frame, micromachining process and selective DC magnetron sputtering techniques were combined. The deposited Film thicknesses were measured by X-ray diffraction (XRD). To characterize the magneto-mechanical properties of the TbDyFe/Ni/TbDyFe Film, the magnetization of the Film on the fabricated actuator was observed using vibrating sample magnetometer (VSM) and the magnetostriction of the actuator was determined by measuring the differences of the curvature of the coated silicon substrates using the optical cantilever method. For the application to a micro-actuator, the maximum deflection of the actuator under 0.5 T was 280 ppm. The results indicate that the Ni layer makes 3-5% lower coercive force and 10-15% enhancement of magnetostriction in low magnetic field (

Y. K. Su - One of the best experts on this subject based on the ideXlab platform.

  • A Novel Transparent Microwave Thin Film Coating Technique Applied to Dual-Band Antennas
    Electronic Materials Letters, 2019
    Co-Authors: Y M Lin, C.y. Hung, H.-w. Wu, Y.w. Chen, S. J. Chang, Y. K. Su
    Abstract:

    In this paper, we propose a novel transparent microwave Thin Film Coating technique and discuss its application in planar dual-band antennas (0.9/5.55 GHz). We developed a new process for activating the nano-alignment Thin Film from high to low resistivity (from 1.96 to 1.29 × 10^−4 Ω cm) and from partial to full transparency (from 55 to 83% transmittance) wiThin 150 s. The platform of the activation process comprises a periodic electrode, an optical microscope, and an alternating current signal generator. The periodic electrode can effectively rearrange the nano-alignment Thin Film into an ordered arrangement, which enhances the properties of the Thin Film in the microwave frequency range. A high-transparency and low-resistivity dual-band antenna is designed and fabricated using the proposed microwave Thin Film Coating technique. The dual-band antenna has operating bandwidths of 740–960 and 5030–7030 MHz and potential applications in transparent electronics such as wearable devices and intelligent cars.Graphic Abstract

  • High efficiency transparent digital television antenna based on nano-structured Thin Film Coating technology
    Proceedings of the 2017 IEEE International Conference on Applied System Innovation: Applied System Innovation for Modern Technology ICASI 2017, 2017
    Co-Authors: S.-c. Chiou, Tzu Chun Tai, Y M Lin, C.y. Hung, H.-w. Wu, Y.w. Chen, S. J. Chang, Y. H. Wang, Y. K. Su
    Abstract:

    © 2017 IEEE. In this paper, we proposed the high transparent digital television (DTV) antenna. The used transparent material is based on nano-structured Thin Film Coating on the glass substrate for achieving the transparency up to 80%. The substrate dimension size of the proposed design is 200 × 150 mm 2 . The proposed antenna has radiation efficiency of 66.52% and having the bandwidth of 0.46-0.66 GHz. The proposed antenna is very much compatible to digital television signal receiving applications.