• Title/Summary/Keyword: Cr-N films

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복합표면처리된 CrZrN 박막의 밀착력에 미치는 스퍼터링 효과에 관한 연구 (Study on the Effect of Sputtering Process on the Adhesion Strength of CrZrN Films Synthesized by a Duplex Surface Treatment Process)

  • 김명근;김은영;이상율
    • 한국표면공학회지
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    • 제39권6호
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    • pp.268-275
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    • 2006
  • In this study, effect of sputtering on the plasma-nitriding substrate and before PVD coating on the microstucture, microhardness, surface roughness and the adhesion strength of CrZrN thin films were investigated. Experimental results showed that this sputtering process not only removed surface compound layer which formed during a plasma nitriding process but also induced an alteration of the surface of plasma nitrided substrate in terms of microhardness distribution, surface roughness. This in turn affected the adhesion strength of PVD coatings. After sputtering, microhardness distribution showed general decrease and the surface roughness became increased slightly. The critical shear stress measured from the scratch test on the CrZrN coatings showed an approximately 1.4 times increase in the adhesion strength through the sputtering prior to the coating and this could be attributed to a complete removal of compound layer from the plasma nitrided surface and to an increase in the surface roughness after sputtering.

복합표면처리된 CrN박막의 밀착력에 미치는 스퍼터링 효과에 관한 연구 (Study on the Effect of Sputtering Process on the Adhesion Strength of CrN Films Synthesized by a Duplex Surface Treatment Process)

  • 김명근;김은영;김정택;이상율
    • 한국표면공학회지
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    • 제39권1호
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    • pp.1-8
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    • 2006
  • In this study, effect of sputtering after plasma nitriding and before PVD coating on the microstucture, microhardness, surface roughness and the adhesion strength of CrN thin films were investigated. Experimental results showed that this sputtering process not only removed surface compound layer which formed during a plasma nitriding process but also induced an alteration of the surface of plasma nitrided substrate in terms of microhardness distribution and surface roughness, which in turn affected the adhesion strength of PVD coatings. After sputtering, microhardness distribution showed general decrease and the surface roughness became increased slightly. The critical shear stress measured from the scratch test on the CrN coatings showed an approximately twice increase in the binding strength through the sputtering prior to the coating and this could be attributed to a complete removal of compound layer from the plasma nitrided surface and to an increase in the surface roughness after sputtering.

비대칭 마그네트론 스퍼터링 방법으로 제작한 CrZrN 박막의 마모특성 분석 (A Study on the wear properties of Cr-Zr-N films deposited by closed field unbalance magnetron sputtering)

  • 김정택;이상율;한준희
    • 한국표면공학회:학술대회논문집
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    • 한국표면공학회 2007년도 춘계학술발표회 초록집
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    • pp.38-39
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    • 2007
  • Chromium nitrids(Cr-N)박막은 경질박막재료이며 특히 PVD법을 제조한 CrN 박막은 다른 이원계 박막에 비해 높은 내마모성을 갖는다고 알려져 있다. 본 실험에서는 CrN박막에 Zr을 첨가하여 3원계의 CrZrN 박막을 합성하여 박막의 Zr 함량에 따른 표면경도 및 조도를 측정하고 Ball-on-disk type의 마모실험과 습도제어 하에서의 마모실험을 실시하였다. 박막의 Zr 함량이 증가함에 따라 박막의 표면경도가 증가하고 표면조도는 낮아지는 것을 알수 있었고, 그에 따라 마찰계수 값 또한 낮게 측정되었다. 습도제어하에서는 마찰계수 값은 비슷한 경향을 보였으나 습도가 매우 낮은 건조한 환경에서는 박막의 마찰계수 값이 높게 나타나는 경향을 보였다.

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비대칭 마그네트론을 이용한 CrTiAlN 나노복합 박막의 미세구조와 기계적 특성 (Microstructural and Mechanical Properties of CrTiAlN Nanocomposite thin films synthesis by Closed Field Unbalanced Magnetron Sputtering)

  • 김연준;이호영;변태준;김갑석;한전건
    • 한국표면공학회:학술대회논문집
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    • 한국표면공학회 2007년도 춘계학술발표회 초록집
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    • pp.65-66
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    • 2007
  • 비대칭 마그네트론을 이용하여 사원계 CrTiAlN 나노 복합 박막을 합성하였고 합성된 박막의 특성을 분석하였다. CrTiAlN 나노복합 박막의 미세구조는 CrN (111)과 CrN (200)방향으로 성장하였고 기계적 특성은 $30\;{\sim}\;39\;GPa$의 경도 값을 얻었다. 질소 분압이 0.33 Pa에서 가장 높은 경도 값을 얻을 수 있었다.

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Growth and Characteristics of Al2O3/AlCrNO/Al Solar Selective Absorbers with Gas Mixtures

  • Park, Soo-Young;Han, Sang-Uk;Kim, Hyun-Hoo;Jang, Gun-Eik;Lee, Yong-Jun
    • Transactions on Electrical and Electronic Materials
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    • 제16권5호
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    • pp.264-267
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    • 2015
  • AlCrNO cermet films were prepared on aluminum substrates using a DC-reactive magnetron sputtering method and a water-cooled Al:Cr target. The Al2O3/AlCrNO (LMVF)/AlCrNO (MMVF)/AlCrNO (HMVF)/Al/substrate of the 5 multi-layers was prepared according to the Ar and (N2 + O2) gas-mixture rates. The Al2O3 of the top layer is the anti-reflection layer of triple AlCrNO (LMVF)/AlCrNO (MMVF)/AlCrNO (HMVF) layers, and an Al metal forms the infrared reflection layer. In this study, the crystallinity and surface properties of the AlCrNO thin films were estimated using X-ray diffraction (XRD) and field-emission scanning electron microscopy (FESEM), while the composition of the thin films was systematically investigated using Auger electron spectroscopy (AES). The optical properties of the wavelength spectrum were recorded using UH4150 spectrophotometry (UV-Vis-NIR) at a range of 0.3 μm to 2.5 μm.

Effects of Film Formation Conditions on the Chemical Composition and the Semiconducting Properties of the Passive Film on Alloy 690

  • Jang, HeeJin;Kwon, HyukSang
    • Corrosion Science and Technology
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    • 제5권4호
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    • pp.141-148
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    • 2006
  • The chemical composition and the semiconducting properties of the passive films formed on Alloy 690 in various film formation conditions were investigated by XPS, photocurrent measurement, and Mott-Schottky analysis. The XPS and photocurrent spectra showed that the passive films formed on Alloy 690 in pH 8.5 buffer solution at ambient temperature, in air at $400^{\circ}C$, and in PWR condition comprise $Cr_2O_3$, $Cr(OH)_3$, ${\gamma}-Fe_2O_3$, NiO, and $Ni(OH)_2$. The thermally grown oxide in air and the passive film formed at high potential (0.3 $V_{SCE}$) in pH 8.5 buffer solution were highly Cr-enriched, whereas the films formed in PWR condition and that formed at low potential (-0.3 $V_{SCE}$) in pH 8.5 buffer solution showed relatively high Ni content and low Cr content. The Mott-Schottky plots exhibited n-type semiconductivity, inferring that the semiconducting properties of the passive films formed on Alloy 690 in various film formation conditions are dominated by Cr-substituted ${\gamma}-Fe_2O_3$. The donor density, i.e., concentration of oxygen vacancy, was measured to be $1.2{\times}10^{21}{\sim}4.6{\times}10^{21}cm^{-3}$ and lowered with increase in the Cr content in the passive film.

질소 인입량 조절에 따른 박막의 물성 및 부식특성에 대한 연구 (A study on the physical and corrosion properties of CrN films with nitrogen concentration)

  • 김은영;명현식;박종인;전유택;나상묵
    • 한국표면공학회:학술대회논문집
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    • 한국표면공학회 2007년도 추계학술대회 논문집
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    • pp.149-150
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    • 2007
  • 플라즈마 코팅공정시 질소 인입량 조절에 따라 비대칭 마그네트론 스퍼터링법으로 CrN 박막을 합성하였으며 증착된 CrN 박막을 XRD, SEM, EDX, ESCA, 양극분극시험 등을 통하여 분석을 실시하였다. 플라즈마 공정시 챔버에 인입하는 질소량이 증가함에 따라 박막의 부식특성이 우수해짐을 확인하였다.

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Bias voltgae에 따른 TiCrAlSiN 코팅막의 미세구조 분석 (Microstructural Characterization of TiCrAlSiN Thin Films Deposited with Various Bias Voltages)

  • 이재욱;이정용;;김선규
    • 한국표면공학회:학술대회논문집
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    • 한국표면공학회 2007년도 춘계학술발표회 초록집
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    • pp.122-123
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    • 2007
  • Bias voltage를 달리하여 cathodic arc plasma 방법으로 Si 기판 위에 성장시킨 TiCrAlSiN 코팅막의 미세구조를 투과전자현미경으로 관찰하였다. -200 V에서 0 V로 bias voltage가 변화함에 따라 'nano-multilayered' 구조가 무너지면서 '주상형(columnar)'구조로 코팅막의 미세구조가 변함을 알 수 있었고, EDS line scan을 통해 multilayer의 화학적 조성 변화를 확인하였다.

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$Si_3N_4$상에 PECVD법으로 형성한 텅스텐 박막의 특성 (Characteristics of PECVD-W thin films deposited on $Si_3N_4$)

  • 이찬용;배성찬;최시영
    • 한국진공학회지
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    • 제7권2호
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    • pp.141-149
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    • 1998
  • $Si_3N_4$상에 PECVD법으로 W박막을 증착하였다. 기판온도와 소스가스의 유량비가 텅 스텐 박막에 미치는 영향을 조사하였다. $150^{\circ}C$~$250^{\circ}C$의 온도 범위 내에서 텅스텐 박막의 증착은 표면반응에 의하여 제한 되었으며, 기판온도와 $SiH_4/WF_6$ 유량비 변화에 따라 150~ 530$\AA$/min의 증착률과 스트레스에 영향을 주었고, 특히 과도한 Si3N4가스는 W박막의 구조, 화학적 결합, 스트레스등을 급격히 변화시켰다. TiN, Ti, Mo, NiCr, Al 등 여러 가지 부착층 상의 텅스텐 박막을 증착시킨 결과, Al이 가장 좋은 부착특성을 보였다.

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