Characteristics of Ni-Ir and Pt-Ir hard coatings surface treated by pulsed Nd:YAG laser

Shih Feng Tseng, Wen Tse Hsiao, Kuo Cheng Huang, Ming Fei Chen, Chao Te Lee, Chang Pin Chou

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The subjects of the presented paper are to develop a laser surface treatment technology for the protective coatings of glass-molding dies and to better understand the interaction between laser beam and materials coated on the die surface. A variety of alloy films, including Ir-25 at% Pt, Ir-50 at% Pt, Ir-75 at% Pt, Ir-25 at% Ni, Ir-50 at% Ni, and Ir-75 at% Ni compositions are deposited by the ion source assisted magnetron sputtering system (ISAMSS). A Cr layer that functioned as a buffer layer is deposited between the alloy film and die surface. After an alloy film and the buffer Cr layer were sequentially coated on tungsten carbide (WC) surface, Nd:YAG laser was directly applied in the writing process. The temperature profile of the film stack structure is simulated by ANSYS software. The surface roughness was analyzed by atomic force microscopy (AFM) to compare the coating surface roughness before and after the laser surface treatments. The treated coatings for oxidation prevention test were examined by energy dispersive x-ray spectrometry (EDS). Nanoindentation instrument was performed to evaluate microhardness and reduced modulus of the coatings. The cross-sectional structures between the hard coating layer and buffer layer were also inspected by a scanning electron microscope (SEM). The Pt-Ir and Ni-Ir film coatings are unable to withstand the working temperature over 1500 °C, which is considered for quartz molding process and hot embossing process. The films showed high roughness, low microhardness and low reduced modulus because the film oxidation occurred in a high working temperature process.

Original languageEnglish
Pages (from-to)1979-1984
Number of pages6
JournalSurface and Coatings Technology
Volume205
Issue number7
DOIs
Publication statusPublished - 2010 Dec 25

Fingerprint

Hard coatings
YAG lasers
pulsed lasers
coatings
Lasers
Buffer layers
Coatings
buffers
Surface roughness
surface treatment
Molding
Microhardness
microhardness
Surface treatment
surface roughness
Coated materials
Oxidation
embossing
oxidation
Quartz

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Tseng, Shih Feng ; Hsiao, Wen Tse ; Huang, Kuo Cheng ; Chen, Ming Fei ; Lee, Chao Te ; Chou, Chang Pin. / Characteristics of Ni-Ir and Pt-Ir hard coatings surface treated by pulsed Nd:YAG laser. In: Surface and Coatings Technology. 2010 ; Vol. 205, No. 7. pp. 1979-1984.
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abstract = "The subjects of the presented paper are to develop a laser surface treatment technology for the protective coatings of glass-molding dies and to better understand the interaction between laser beam and materials coated on the die surface. A variety of alloy films, including Ir-25 at{\%} Pt, Ir-50 at{\%} Pt, Ir-75 at{\%} Pt, Ir-25 at{\%} Ni, Ir-50 at{\%} Ni, and Ir-75 at{\%} Ni compositions are deposited by the ion source assisted magnetron sputtering system (ISAMSS). A Cr layer that functioned as a buffer layer is deposited between the alloy film and die surface. After an alloy film and the buffer Cr layer were sequentially coated on tungsten carbide (WC) surface, Nd:YAG laser was directly applied in the writing process. The temperature profile of the film stack structure is simulated by ANSYS software. The surface roughness was analyzed by atomic force microscopy (AFM) to compare the coating surface roughness before and after the laser surface treatments. The treated coatings for oxidation prevention test were examined by energy dispersive x-ray spectrometry (EDS). Nanoindentation instrument was performed to evaluate microhardness and reduced modulus of the coatings. The cross-sectional structures between the hard coating layer and buffer layer were also inspected by a scanning electron microscope (SEM). The Pt-Ir and Ni-Ir film coatings are unable to withstand the working temperature over 1500 °C, which is considered for quartz molding process and hot embossing process. The films showed high roughness, low microhardness and low reduced modulus because the film oxidation occurred in a high working temperature process.",
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Characteristics of Ni-Ir and Pt-Ir hard coatings surface treated by pulsed Nd:YAG laser. / Tseng, Shih Feng; Hsiao, Wen Tse; Huang, Kuo Cheng; Chen, Ming Fei; Lee, Chao Te; Chou, Chang Pin.

In: Surface and Coatings Technology, Vol. 205, No. 7, 25.12.2010, p. 1979-1984.

Research output: Contribution to journalArticle

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T1 - Characteristics of Ni-Ir and Pt-Ir hard coatings surface treated by pulsed Nd:YAG laser

AU - Tseng, Shih Feng

AU - Hsiao, Wen Tse

AU - Huang, Kuo Cheng

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AU - Lee, Chao Te

AU - Chou, Chang Pin

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AB - The subjects of the presented paper are to develop a laser surface treatment technology for the protective coatings of glass-molding dies and to better understand the interaction between laser beam and materials coated on the die surface. A variety of alloy films, including Ir-25 at% Pt, Ir-50 at% Pt, Ir-75 at% Pt, Ir-25 at% Ni, Ir-50 at% Ni, and Ir-75 at% Ni compositions are deposited by the ion source assisted magnetron sputtering system (ISAMSS). A Cr layer that functioned as a buffer layer is deposited between the alloy film and die surface. After an alloy film and the buffer Cr layer were sequentially coated on tungsten carbide (WC) surface, Nd:YAG laser was directly applied in the writing process. The temperature profile of the film stack structure is simulated by ANSYS software. The surface roughness was analyzed by atomic force microscopy (AFM) to compare the coating surface roughness before and after the laser surface treatments. The treated coatings for oxidation prevention test were examined by energy dispersive x-ray spectrometry (EDS). Nanoindentation instrument was performed to evaluate microhardness and reduced modulus of the coatings. The cross-sectional structures between the hard coating layer and buffer layer were also inspected by a scanning electron microscope (SEM). The Pt-Ir and Ni-Ir film coatings are unable to withstand the working temperature over 1500 °C, which is considered for quartz molding process and hot embossing process. The films showed high roughness, low microhardness and low reduced modulus because the film oxidation occurred in a high working temperature process.

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