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Lee, Na Gyeom
- The Journal of the Convergence on Culture Technology
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- v.4 no.4
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- pp.295-300
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- 2018
This study was conducted to aerermine the sensory evaluation and the texture characteristics after making Jeolpyeon added to Laver powder(0~8%) in according to concentration which has nutritive value and medical effect of Jeolpyeon traditional dduk. As the result of the values of Hunter color system, the L-values of the laver powder Jeolpyeon significantly decreased, and the a-values also significantly increased(p<0.05). The b-values Jeolpyeon added with laver powder higher than the control group. As the amoung of laver powder added has increased, the b-values has dropped showing a green color. In case of texture analysis hardness, cohesiveness and gumminess of laver powder Jeolpyeon increased(p<0.05). Also, the results of the sensory evaluateion showed that the 4% laver powder Jeolpyeon had the highest scores.
https://doi.org/10.17703/JCCT.2018.4.4.295 인용 PDF KSCI HTML

Chae, Jae-Hong;Park, Joo-Seok;Ahn, Jong-Pil;Kim, Kyoung-Hun
- Journal of the Korean Ceramic Society
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- v.46 no.1
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- pp.81-85
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- 2009
$B_4C$ ceramics were fabricated by a hot-press sintering method and their sintering behavior, microstructure and mechanical properties were evaluated. Relative density of $B_4C$ ceramics were obtained by a hot-press sintering method reached as high as 99% without any sintering additives. The mechanical properties of $B_4C$ ceramics was improved by a methanol washing process which can remove $B_2O_3$ phase from a $B_4C$ powder surface. This improvement results from the formation of homogeneous microstructure because the grain coarsening was suppressed by the elimination of $B_2O_3$ phase. Particularly, mechanical properties of the sintered specimen using a methanol washed powder improved compared with the specimen using an as-received commercial powder.
https://doi.org/10.4191/KCERS.2009.46.1.081 인용 PDF KSCI

Cha, Byung-Chul;Bang, Hyun-Bae;Jo, Hyung-Ho;Jung, Uoo-Chang
- Journal of the Korean institute of surface engineering
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- v.44 no.2
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- pp.55-59
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- 2011
In this study, the mechanical properties of boronized 316L austenitic stainless steel have been investigated. Boronizing was carried out in solid medium consisting of Ekabor powder at $900^{\circ}C$ and $1000^{\circ}C$ for 2, 4 and 8 hours, respectively. The properties of sample were analyzed by field emission scanning electron microscope, X-ray diffractometer, Glow discharge spectrometer, micro-hardness tester and ball-on-disk wear tester. Increasing the boronizing time and temperature, the hardness of boronized samples were shown over Hv 2000 and the thickness of boride layers were also increased linearly. XRD patterns of samples were revealed the presence of borides such as FeB, $Fe_2B$, CrB, $Cr_2B$ and $Ni_3B$. Friction coefficient of boronized STS 316L was shown the low value at $900^{\circ}C$ for 8 hours and $1000^{\circ}C$ for 4 hours, respectively.
https://doi.org/10.5695/JKISE.2011.44.2.055 인용 PDF KSCI

Park, S.C.;Lim, Y.J.;Kang, S.G.;Chung, J.K.;Kim, C.J.;Kim, C.J.
- Progress in Superconductivity and Cryogenics
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- v.10 no.1
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- pp.19-23
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- 2008
Spherical $MgB_2$ powders was synthesized with the ultrasonic spray pyrolysis(USP) process using aqueous solutions of boron and magnesium ion. The properties of synthesized $MgB_2$ powder were characterized by XRD, SEM and EDS. A small amount of MgO was detected as the secondary phase out of the synthesized powder and the ratios of $MgB_2$ to MgO increased with increasing furnace temperature. The particle size and morphology of $MgB_2$ powder were investigated with varying molar concentration of the boron and magnesium solution and furnace temperature between $600^{\circ}C$ and $1000^{\circ}C$ in $Ar/H_2$. The average particle size of $MgB_2$ showed narrow distribution ranging from 300nm to 400nm. The morphology of particles exhibited mostly spherical shapes and uniform distribution.
https://doi.org/10.9714/psac.2008.10.1.019 인용 PDF KSCI