• Title/Summary/Keyword: Aluminum film

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Environmental Evaluation of Protein Based Oxygen High Barrier Film Using Life Cycle Assessment (단백질 기반 Oxygen High Barrier 소재의 전과정평가를 통한 환경 영향 측정)

  • Kang, DongHo;Shin, YangJai
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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    • v.25 no.1
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    • pp.1-10
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    • 2019
  • Environmental evaluation of two different oxygen high barrier films were performed using life cycle assessment. One of the films (traditional film) was composed of aluminum oxide coated PET film, ink, LDPE and LLDPE. Another film (new film) was consists of PET, ink, protein based coating material, LDPE, LLDPE. Main layer to achieve the high oxygen barrier for traditional film was aluminum oxide coated PET film, whereas the protein based coating material act as oxygen barrier layer for new film. Functional unit of this study was 1000 pouches made of traditional and new film. System boundary was factory to gate. The results of this study revealed that the new film shows better environmental performance for most of impact indicator than traditional film, except marine eutrophication and fine particulate matter formation due to extra coating process in new film system.

A Study on the Tribological Characteristics of AL7075-T7351 Aluminum Alloy Coated with TiN Nano Thin Film (TiN 나노 박막을 코팅한 AL7075-T7351 알루미늄 합금의 트라이볼로지 특성에 관한 연구)

  • Kwang-Su Kim;Sung-Hoon Im;Do-Hyeon Kim;Hyeong-Jun Park;Sun-Cheol Huh
    • Journal of the Korean Society of Industry Convergence
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    • v.26 no.5
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    • pp.743-750
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    • 2023
  • Aluminum alloy is a material widely used in the aircraft industry. However, since it has relatively low hardness, strength and tribological properties, it is necessary to improve these properties. In this paper, a TiN thin film was coated on the surface of AL7075-T7351 using DC magnetron sputtering. The coating was performed by setting different deposition pressure, deposition time, and applied power. Then, the tribological properties of the thin film were investigated. As a result of the experiment, the hardness of the thin film was higher than that of the base material, and the specimen with the highest hardness had excellent friction coefficient, wear amount, and adhesive strength characteristics. Through this study, it was confirmed that the tribological characteristics of aluminum alloy can be improved by depositing thin films using DC magnetron sputtering.

Novel Methods for Measuring the Surface Hardness of Anodic Oxide Films on Aluminum Alloy (알루미늄 합금 양극산화피막의 표면경도 측정법)

  • Moon, Sungmo
    • Journal of Surface Science and Engineering
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    • v.53 no.1
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    • pp.36-42
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    • 2020
  • In this study, two novel methods to measure the surface hardness of anodic oxide films on aluminum alloys are reported. The first method is to impregnate oil-based ink into pores in the anodic oxide film and then to clean the ink on the surface using ethanol, resulting in an impregnation of inks only inside of the pores in anodic oxide film. The second method is to coat the anodic oxide film surface with thin Au layer less than 0.1 ?. Both the ink-impregnating method and Au-coating method provided clear indentation marks on the anodic oxide film surface when it was indented using a pyramidal-diamond penetrator. Thus, Vickers hardness of anodic oxide films on aluminium alloy could be measured successfully and precisely from the anodic film surface. In addition, advantages and disadvantages of the ink-impregnating method and Au-coating method for the measurement of surface hardness of anodic oxide films are discussed.

Innovative Approach to Sintering Aluminum and Aluminum Alloy Powders for Rapid Manufacturing Applications

  • Liu, Jianxin;Kuhn, Howard A.
    • Proceedings of the Korean Powder Metallurgy Institute Conference
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    • 2006.09a
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    • pp.246-247
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    • 2006
  • A new approach to sintering loose packed, coarse aluminum alloy powder to full or near full density is presented. A controlled amount of water vapor is introduced into the sintering atmosphere, which disru pts the oxide film and allows metallurgical contact between particles. In addition, supersolidus liquid phase sintering is used to sinter the part to full density. Since the method is particularly applicable to uncompacted powders, it is potentially useful for sintering aluminum powder preforms manufactured by 3DPrinting and powder injection molding.

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A Study on the Infrared Radiation Properties for SiO$_2$/Fe$_2$O$_3$Films Coated on aluminum (알루미늄에 코팅된 SiO$_2$/Fe$_2$O$_3$막의 적외선 복사특성에 관한 연구)

  • 강병철;김기호
    • Journal of Surface Science and Engineering
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    • v.36 no.5
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    • pp.406-412
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    • 2003
  • FT-IR and thermography were used to investigate the infrared radiation characteristic of SiO$_2$ film and SiO$_2$/Fe$_2$O$_3$film coated on aluminum. Through FT-TR spectrum, SiO$_2$film showed high infrared absorption in accordance with the stretching vibration of Si-O-Si, and as$ Fe_2$$O_3$was mixed additional absorption band appeared resulting from the stretching vibration of Fe-O at $590cm^{-1}$ and the bond of Si-O-Fe at $900 cm^{-1}$ The two kinds of film measured by the integration method and the reflective method coincided with each other in the wavelength area of infrared absorption and radiation, and corresponded well with Kirchhoff's law as the infrared emissivity is high in wavelength where infrared absorption rate is high. The emissivity of $SiO_2$ film was 0.65 and that of $SiO_2$/Fe$_2$$O_3$film was 0.77, so the addition of$ Fe_2$$O_3$ raised the infrared emissivity by approximately 13%.$ SiO_2$$Fe_2$$O_3$ film is efficient as an infrared radiator at below $100^{\circ}C$. The temperature of heat radiation after 7 minutes was 117$^{\circ}C$ in aluminum plate and $155^{\circ}C$ in $SiO_2$$Fe_2$$O_3$ film, $38^{\circ}C$ higher than the former.

Effects of Various Deposition Rates of Al2O3 Gate Insulator on the Properties of Organic Thin Film Transistor (알루미늄 옥사이드 절연층의 증착율이 유기박막 트랜지스터의 특성에 미치는 영향)

  • Choi, Kyung-Min;Hyung, Gun-Woo;Kim, Young-Kwan;Choi, Eou-Sik;Kwon, Sang-Jik
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.22 no.12
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    • pp.1063-1066
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    • 2009
  • In this study, we fabricated pentacene organic thin film trasistors(OTFTs) which used aluminum oxide as the gate insulator. Aluminum oxide for OTFTs was deposited on glass substrate with a different deposition rate by E-beam evaporation. In case of the deposition rate of $0.1\;{\AA}$, the fabricated aluminum oxide gate insulating OTFT showed a threshold voltage of -1.36 V, an on/off current ratio of $1.9{\times}10^3$ and field effect mobility $0.023\;cm^2/V_s$.

Selectrive chemical vapor deposition of aluminum for the metallization of high level IC (고집적회로 금속선 형성을 위한 화학증작 알루미늄의 선택적 증착)

  • 이경일;김영성;주승기
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.31A no.12
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    • pp.31-37
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    • 1994
  • Aluminum films were deposited by the pyrolysis of triisobutylaluminum(TIBA) in a cold wall LPCVD system for the metallization of high level IC. the selectivity on Si/SiO2 substrate and the contact resistance on submicron contacts were investigated. The carbon free aluminum film could be obtained when the aluminum film was deposited at low substrate temperature. Contact resistances of CVD Al/n+ Si contacts whose contact size was 0.5 .mu.m werre as low as 20~40.OMEGA./ea, which is 30~50% of contact resistance obtained by sputtering technique.

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Temperature cycling test of Cu films on anodized aluminum substrate of metal-PC application

  • Kim, Hyeong-Jin;Park, Jae-Won
    • Proceedings of the Korean Vacuum Society Conference
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    • 2011.02a
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    • pp.334-334
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    • 2011
  • We applied N-ion bombardment and heat treatment to the Cu thin films deposited on aluminum oxide layer for the enhancement of adhesion. With e-beam evaporation method. $1,000{\AA}$ thick Cu pre-bombardment layer was deposited on the aluminum oxide surface and then N-ion beam was bombared in order to mix the atoms at the film/substrate interface. Additional $4,000{\AA}$-thick Cu film was the coated. Subsequently, the ion mixide Cu on aluminum oxide was annealed at $200^{\circ}C$ and $300^{\circ}C$ in vacuum.

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Study on Thermally Properties of $250^{\circ}F$ Epoxy-Adhesive Film for Aluminum Sandwich Construction with Weight Reduction (차체경량화 알루미늄 샌드위치구조용 $250^{\circ}F$ 에폭시 접착필름 열적 특성 평가)

  • Oh Kyung-Won;Lee Sang-Jin;Jeong Jong-Cheol;Cho Sea-Hyun;Mok Jai-Kyun
    • Proceedings of the KSR Conference
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    • 2005.11a
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    • pp.1089-1096
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    • 2005
  • This study was experimental test of edgewise compression properties for aluminum(type-50XX) sandwich panel with thermal environment and surface treatment using adhesive film. There was decreasing $10\%-peel$ strength after thermal environment. Through compressive. buckling mode know to seen of properties of adhesive, sheet and core strength. First case of Chromate to aluminum sheet, know low shear strength of adhesive through buckling mode but case of Beomite to aluminum sheet, know than thin sheet and core low strength through buckling mode.

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Effects of Corrosion Inhibitor on Corrosion of Al-based Alloys in Ethylene Glycol-Water Coolant Environment

  • Gwang-Soo Choi;Young-Man Kim;Chan-Jin Park
    • Corrosion Science and Technology
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    • v.22 no.5
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    • pp.305-313
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    • 2023
  • The objective of this study was to investigate the effectiveness of sodium dodecyl benzene sulfonate (SDBS) as a corrosion inhibitor on the pitting corrosion behavior of aluminum alloys used in electric vehicle battery cooling systems within a mixture of ethylene glycol and water (EG-W) coolant. Potentiodynamic polarization testing revealed unstable passive film formation on the aluminum alloys in the absence of SDBS. However, the addition of SDBS resulted in a robust passive film, enhancing the pitting corrosion resistance across all examined alloys. Pitting corrosion was predominantly observed near intermetallic compounds in the presence of Cl? ions, which was attributed to galvanic interactions. Among tested alloys, A1040 demonstrated superior resistance due to its lower areal fraction of precipitates and donor density. The incorporation of SDBS inhibitors mitigated the overall pitting corrosion process by hindering Cl? ion penetration. These findings suggest that SDBS can significantly improve pitting corrosion resistance in aluminum alloys employed in battery coolant environments.