Su-Jien Lin

National Tsing Hua University

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Jien‐Wei Yeh

National Tsing Hua University

Shou-Yi Chang

National Tsing Hua University

Swe-Kai Chen

National Tsing Hua University

Ming–Hung Tsai

National Tsing Hua University

Kuo‐Shung Liu

National Tsing Hua University

Chia-Han Lai

National Tsing Hua University

Ching-Yin Lee

Caritas Medical Centre

Ying‐Hao Chu

National Tsing Hua University

Chun‐Chieh Wang

Powertech Technology (Taiwan)

Ming‐Hao Chuang

National Tsing Hua University

Cooperative Institutions

National Tsing Hua University

116

National Yang Ming Chiao Tung University

National Taiwan University

National Synchrotron Radiation Research Center

Industrial Technology Research Institute

National Chung Hsing University

Taiwan Semiconductor Manufacturing Company (Taiwan)

Materials Science & Engineering

National Taiwan University of Science and Technology

National Hsinchu University of Education

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Dielectric breakdown of an unpoled piezoelectric material with a conductive channel

Fatigue & Fracture of Engineering Materials & Structures (2009)

Su-Jien Lin Hyeon Gyu Beom D. Tao Young Hyo Kim

ABSTRACT The dielectric breakdown of an unpoled piezoelectric ceramic, PZT807, with a conductive channel, is investigated. Cylindrical bar specimens with a conductive channel are used for breakdown tests of the unpoled piezoelectric ceramic under purely electrical loads. Narrow tubular channels emanating from the head of the initial channel are observed in the specimens after breakdown occurs. The radius of the tubular channel that is created at the surface of the initial channel head is insensitive to various types of channel formation. The problem of a fine tubular channel that emanates from the initial channel head is numerically solved to evaluate the three‐dimensional J integral, which is directly related to the energy that is available at breakdown, at the initiation of a new channel in the specimen. The critical J integral at the onset of breakdown is obtained.

Bar (unit)

10.1111/j.1460-2695.2009.01362.x

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Citations (7)

High Adhesion Ability and Compositional Stability of Multielement (Alcrnbsiti)N Films Fabricated Via High-Power Impulse Magnetron Sputtering

Ching-Yin Lee Peng-Hsi Chen Su-Jien Lin Jien-Wei Yeh

Herein, (AlCrNbSiTi)N films of nine different compositions were designed and fabricated by high-power impulse magnetron sputtering. The AlCrNbSiTi system exhibited high compositional stability. All films had a single face-centered cubic (NaCl-type) structure with a crystal size of approximately 6 nm and lattice constant of approximately 4.22 Å. The hardness of the films varied from 25.85 to 27.6 GPa. After an oxidation resistance test, the thickness of the films was determined to be less than 30 nm. Under dry-milling conditions, the (AlCrNbSiTi)N system outperformed commercial coatings (TiN, TiCN, TiAlN, and AlTiN) and did not peel off during a milling test on a 304 stainless steel workpiece without a lubricant. Moreover, the (AlCrNbSiTi)N film coatings exhibited a low flank wear of 85.2 μm. The mechanical properties of the coatings were unaffected by their compositional changes under thermal loads and abrasion; thus, they are suitable for various industrial applications.

Cavity magnetron

10.2139/ssrn.4419946

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Citations (0)

Microstructure characterization of Alx CoCrCuFeNi high-entropy alloy system with multiprincipal elements

Metallurgical and Materials Transactions A (2005)

C. H. Tong Yuliang Chen Jien‐Wei Yeh Su-Jien Lin Swe-Kai Chen

High-Entropy Alloys

Spinodal decomposition

Differential thermal analysis

10.1007/s11661-005-0283-0

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Citations (1,087)

Electrical failure of piezoelectric ceramics with a conductive crack under electric fields

Engineering Fracture Mechanics (2009)

Hyeon Gyu Beom Kyoung Moon Jeong J.Y. Park Su-Jien Lin Gyu-sang Kim

Poling

10.1016/j.engfracmech.2009.08.004

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Citations (20)

Effects of Duty Cycle and Substrate Bias on the Microstructure and Properties of (Alcrnbsiti)N High-Entropy Nitride Films Deposited By High-Power Impulse Magnetron Sputtering

Hao-En Peng Ching-Yin Lee Su-Jien Lin Jien‐Wei Yeh

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Duty cycle

High-Entropy Alloys

10.2139/ssrn.4687536

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Citations (0)

Thermal characteristics of Al2O3–MgO and Al2O3–spinel castables for steel ladles

Ceramics International (2002)

Swe-Kai Chen Min‐Yuan Cheng Su-Jien Lin Yung‐Chao Ko

Thermal shock

Silica fume

Slag (welding)

Penetration (warfare)

10.1016/s0272-8842(02)00047-0

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Citations (59)

Anomalous decrease in X-ray diffraction intensities of Cu–Ni–Al–Co–Cr–Fe–Si alloy systems with multi-principal elements

Materials Chemistry and Physics (2007)

Jien‐Wei Yeh Shou-Yi Chang Yu-Der Hong Swe-Kai Chen Su-Jien Lin

Lattice constant

10.1016/j.matchemphys.2007.01.003

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Citations (613)

Different lattice distortion effects on the tensile properties of Ni-W dilute solutions and CrFeNi and CoCrFeMnNi concentrated solutions

Acta Materialia (2021)

Kuan-Hao Lin Chieh-Min Tseng Chu-Chun Chueh Shou-Yi Chang Yu‐Chieh Lo

The lattice distortion of a solute primarily occurs because its atomic size and chemical bonding are different from those of neighboring atoms. The lattice distortion effects in conventional and high-entropy alloys are different; however, a detailed investigation on these effects has yet to be conducted. To fill this research gap, this study produced face-centered cubic-structured dilute solutions (Ni, Ni–2 at.% W, and Ni–4 at.% W) and concentrated solutions (equiatomic CrFeNi and CoCrFeMnNi) and compared their tensile properties. For the two W-containing alloys, lattice distortion occurred only around the large and strong W atoms. However, for the two concentrated solutions, which had a similar interelement atomic size and shear modulus to the aforementioned alloys, lattice distortion occurred at all lattice sites. These two types of lattice distortion had significantly different effects on tensile properties. The strength and ductility of the alloys with a high concentration of distorted lattice points were higher than those of the alloys with a low concentration of distorted lattice points, although the alloys with a low concentration of distorted lattice points had a larger nominal atomic size difference and shear modulus difference. The mechanisms underlying the evolution of different mechanical properties under different types of lattice distortion were examined for the dilute and concentrated alloys. Moreover, the universal solid solution strengthening mechanism was observed.

Lattice (music)

High-Entropy Alloys

Shear modulus

Atomic radius

Lattice constant

10.1016/j.actamat.2021.117399

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Citations (26)

Effects of Ti addition on thermal properties of diamond/Ag–Ti composites fabricated by liquid sintering

Materials Letters (2013)

Mu-Tse Lee Chih-Yu Chung Chun-Ming Lin Su-Jien Lin

10.1016/j.matlet.2013.11.001