• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 하계학술대회 논문집
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• pp.1036-1038
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• 2001

The sapphire orientation dependence of the crystallization of ZnO thin films has been studied using real-time synchrotron x-ray scattering. The amorphous ZnO thin films with a 2400-${\AA}$-thick were grown on sapphire(110) and sapphire(001) substrates by radio frequency magnetron sputtering at room temperature. The amorphous ZnO films were crystallization into epitaxial ZnO(002) grains both on the sapphire(110) and on the sapphire(001) substrates. The epitaxial quality, such as mosaic distribution and crystal domain size, of the ZnO grains on the sapphire(110) is high, similar to that of the ZnO grains on the sapphire(001). With increasing the annealing temperature to 600$^{\circ}C$, the mosaic distribution and the crystal domain size of ZnO(002) grains in the film normal direction was improved and decreased, respectively.

• 한국표면공학회지
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• 제18권3호
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• pp.95-104
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• 1985

A study has been made of preferred orientation, crose sectional microstructure, surface morphology and mechanical properties of copper foils fabricated by electrodeposition on 304 stainless steel plate from copper sulfate baths for high speed plating. The preferred orientation of the copper foils changed from the [110] to the [111] to ture with decreasing bath temperature and increasing cathode current density. The foils with the [110] texture had the field oriented texture type structure and the surface of many asperities grooved approximately perpendicular to the subtrate. A specimen with the [111]+[311] texture had the lower strength than one with the [10] texture, if they were obtained under similar electrolysis conditions.

• 한국세라믹학회:학술대회논문집
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• 한국세라믹학회 2002년도 추계총회 및 연구발표회 초록집
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• pp.110.2-110
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• 2002

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1997년도 춘계학술대회논문집
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• pp.233-239
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• 1997

The effect of the cross-rolling on the evolution of the deformation texture and the subsequent annealing texture was studied in 5182 aluminium alloy. The orientation density near {011}<110>. The weak ${\beta}$-fiber orientations in the deformation texture lead to the randomization of the annealing texture, whereas the strong ${\beta}$-fiber orientations lead to the strong Cube orientation in the annealing texture. The development of the strong rotated Cube orientation in the annealing texture seemed to be related with the decrease in the R-value.

• 한국세라믹학회지
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• 제27권2호
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• pp.155-160
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• 1990

Al-rich Mg-Al spinel single crystals were grown by Verneuil process using oxygen and hydrogen flame. Spinel single crystals were grown in chemical compositions from MgO : Al2O3 mole ratio 1 : 1 to 1 : 3. Mole ratio 1 : 1 was hard to be grown and mole ratio 1 : 2.5 and 1 : 3 were grown well. Selecting well-grown mole ratio 1 : 3, seeds were prepared having [100], [110] and [111] orientation respectively. Growth rate were highest in [100] orientation and lowest in [111] orientation.

• 한국재료학회지
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• 제29권10호
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• pp.647-655
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• 2019

In order to analyze the effect of hot asymmetric rolling on the microstructure and texture of aluminum alloy and to investigate the effect of the texture on the formability and plastic anisotropy of aluminum alloy, aluminum 6061 alloy is asymmetrically rolled at room temperature, $200^{\circ}C$, $350^{\circ}C$, and $500^{\circ}C$, and the results are compared with symmetrically rolled results. In the case of asymmetric rolling, the equivalent strain (${\varepsilon}_{eq}$) is greatest in the upper roll part where the rotational speed of the roll is high and increases with increasing rolling temperature. The increase rate of the mean misorientation angle with increasing temperature is larger than that during symmetrical rolling, and dynamic recrystallization occurs the most when asymmetrical rolling is performed at $500^{\circ}C$. In the case of hot symmetric rolling, the {001}<110> rotated cube orientation mainly develops, but in the case of hot asymmetric rolling, the {111}<110> orientation develops along with the {001}<100> cube orientation. The hot asymmetric rolling improves the formability (${\bar{r}}$) of the aluminum 6061 alloy to 0.9 and reduces the plastic anisotropy (${\Delta}r$) to near zero due to the {111}<110> shear orientation that develops by asymmetric rolling.

• 한국재료학회지
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• 제3권4호
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• pp.336-343
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• 1993

본 연구에서는 orthorhombic결정구조를 갖는YBa/sub 2/Cu/sub 3/ O/sub 7/-x에대해[001-110-110]을 잇는 표중 ECP map을 작성하였고 이에 대한 지수를 결정하였다. 그 후, 소성가공으로 배향화시킨 산화물 추전도체의 결정입 방위분포를 개개의 결정입에 대하여 정량화할 수 있는 ECP(electron channeling pattern)법으로 해석하여 임계전류밀도(jc)와 결정배향도의관계를 조사하였다. 실온에서 압축한 tape에 대해 JC를 측정한 결과, tape의 두께감소에 따라JC는 크게 증가하였으며 이는 tape의 두께가 감소함에따라 결정립의 (001) 배향도가 높아진데 기인한 것임을 ECP로 방위해석한 결과 알 수 있었다. 또한 고온에서 50% 압축변형시킨 시료의 경우도 강한 c축배향이 나타남을 ECP로 방위해석한 결과 확인할 수 있었다. 본 연구를 통해 ECP법을 이용한 결정방위 해석법은 JC등 초전도특성이 결정방위분포에 의존하는 산화불 초전도체의 조직제어 연구 등에 유효하게 응용될 수 있다는 것을 알 수 있었으며, 특히 박막이나 tape 등 크기가 작은 시료의 방위해석에 효과적으로 이용될 수 있을 것으로 기대된다.

• JSTS:Journal of Semiconductor Technology and Science
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• 제14권5호
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• pp.518-524
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• 2014

The substrate doping concentration dependence of strain-enhanced electron mobility in (110)/<110> nMOSFETs is investigated by using a self-consistent Schr$\ddot{o}$dinger-Poisson solver. The electron mobility model includes Coulomb, phonon, and surface roughness scattering. The calculated results show that, in contrast to (100)/<110> case, the longitudinal tensile strain-induced electron mobility enhancement on the (110)/<110> can be increased at high substrate doping concentration.

• 한국표면공학회지
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• 제22권4호
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• pp.207-214
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• 1989

The surface morphology and the proferred orientation of the Pb-Sn alloy electrodeposite were investated by the change of electrolysis conditions in pulse current electroplating. The preferred orientation of Pb-phase in alloy deposits was changed in the sequence of (110)longrightarrow(100)or(100)+(111)longrightarrow(111) with increasing peak current density, while that of $\beta$-Sn phase changed from (321)+(301)to(301)+(111) mixed orientation. The surface morphology was closely related to the preferred orientation of alloy electrodeposits. The alloy deposits, which had (100)or(111) for pb-phase and (321)or(100)(301)for $\beta$-Sn sespectively, showed the surface structure of granular crystallites. The alloy deposits whih mixed orientations for both phases had microstructure of closely the closely stacked crysrallites, which was inclined to the surface.

• 아태비즈니스연구
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• 제7권2호
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• pp.77-92
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• 2016

The purpose of this study is to examine the effect of CEO's entrepreneurial orientation on innovation performance and business performance, and the mediating effect of innovation performance on the relationship between entrepreneurial orientation and business performance in small and medium-sized venture-enterprises (SMEs). To test the hypothesized relationships, we have conducted a survey of Korean SMEs. After excluding unanswered and untrustful item questionnaires, the final sample size for this study is 110 SMEs. The major findings of the empirical research are as follows. First, CEO's entrepreneurial orientation had apositive influence on innovation performance of a firm. Second, CEO's entrepreneurial orientation was positively related to business performance of a firm. Third, innovation performance had the partial mediating effect on the relationship between CEO's entrepreneurial orientation and business performance of a firm. That is, this result indicates that CEO's entrepreneurial orientation indirectly effects on business performance through innovation performance. Based on these findings, implications of the research findings are discussed, and recommendation for future research are provided.