The genetic diversity of collected strains in Korea and commercial cultivars was analyzed using inter-simple ... in species. ... sequence repeat (ISSR) markers.
to the sintering temperature. ... The objective of this study is to reveal the sintering mechanism of mixed Ti-6Al-4V powders considering ... However, as Ti particles become coarser, sintering of the powders appears to be retarded due to slower
(interface) energy A= total surface (interface) area γ: γss(solid/solid), γsl(solid/liquid) or γsv(solid ... 그리고 교수님께서 첫 수업시간에 설명해주신 γsv>γss 인 이유를 생각해 보았습니다. ... /vapour) Δγ→densification ΔA→coarsening γsv>γss 프린트물에 나온 그림을 보면 쉽게 이해할 수 있습니다.
Few studies have been performed on ZrB2- graphite platelet composite made by spark plasma sintering ... The ZrB2- 10Gp, ZrB2- 15Gp, ZrB2- 30SiC-10Gp, and ZrB2- 30SiC-15Gp specimens were sintered by the SPS ... samples.
in solid state sintering. ... sintering with Fe and Cu powder. 1. ... For materials which are hard to sinter a process called liquid phase sintering is commonly used.
Fibers have been used since the 1950s as structural reinforcements
to develop metal-matrix composites ... exhibit excellent elasticity with strength 10 times higher and
density 1/5 less than those of steel ... The resulting polyacrylonitrile-based CFs are still used
in a wide-variety of applications since they
알루미나, 전이금속 화합물 소결시 색상 변화 및 물리적 특성 변화 관찰 광학현미경 관측 실험 실험일시 및 장소 실험 목적 소결에 의한 재료의 특성변화에 대해 살펴본다. 사용한 실험기 자재, 시약 및 재료 (일반, 전이, 전이후)금속산화물분말(Al2O3, MgO, Cr..
density, sintering temperature and sintering time on dimensional changes. ... The iron-copper-carbon system is commonly used alloys in sintered structural parts production. ... This study is an effort to clarify the influence of common factors on dimensional change of Fe-Cu-C sintered
```````````````````````:2.25㎝# ④`소결체`두께``````````````````````````````:0.20㎝# ⑤`소결체`부피# ``= LEFT ( {직경 ... 증류수`중`밀도# ```= LEFT [ {1.97} over {LEFT ( 1.97-1.20 RIGHT )} RIGHT ] *0.9975=2.552g/㎤# ⑦`상대`밀도# ``= ... 실험 결과 ①`공기`중`질량`````````````````````````````:1.97g# ②``23 CENTIGRADE `증류수`중`질량:1.20g# ③`소결체`직경```````
Twenty Inter simple sequence repeat (ISSR) primers were used to assess genetic diversity of 64 Agaricus ... strainsincluding 45 A. bisporus strains and other 19 Agaricus spp. ... or within A. bisporus strains.
또한, 참개구리류와 옴 In order to clarify intra-and inter-specific variation of Korean Rana species, the partial ... DNA sequences of mitochondrial 16S rDNA gene were determined from 6 Korean and 1 Japanese Rana species ... , DNA sequences from Korean and Japanese species were comparis 한국환경생물학회 환경생물 송재영, 신정아, 장민호, 윤병수, 정규회
Using spark plasma sintering process (SPS), Ti-6Al-4V alloy powders were successfully consolidated without ... Compared with hot isostatic pressing (HIP), the sintering time and temperature could be lowered to be ... Considering the density of 98.5% and elongation of 24%, further improving the tensile strength would
The sintering temperature above 698K had no effect on the strength of the sintered materials. ... The microstructure as solidified was maintained even after the spark plasma sintering at the heating ... beared the highest solidification rate among the atomization processes.
and productive inter-organizational relationships among the transportation organizations. ... the inter-organizational relationships among the elements and to derive problem areas; and finally to ... This study has the following scopes: to define the transportation system; to derive the subsystems, i.e
화물수송수요예측은 화물의 이동에 대한 분석의 과정으로써 다양한 정책들, 사회기반시설의 개선, 인적 자원, 기술적 지원, 자료의 유용성 등을 고려해야한다. 성공적인 수요 예측모형은 경제 활동, 화물의 흐름, 수송수단간 통행량의 관계를 설명하여 물동량과 같은 관련 변수들..
Korea has serious human right violation, and it is a financial lifeline of North Korean military. ... However, in ROK government’s view, even though the KIC itself is located in outside of border, as the ... South Korean government asked other governments to recognise KIC goods as South Korean products when some
가스압 소결법 (gas pressure sintering, GPS)의 기본원리는 반응식 (1)에서 찾아볼 수 있다. ... 소결 초기 단계의 평균 bounary stress는 σn = 2πXγsinθ/πx2 인데 곡률로 인한 neck에서의 local stress보다 작다. ... Y= fractional shinkage Al2O3에서 prismatic glide에 대한 yeild stress는 T R=10-4㎝ γ=103dynes/㎝ → Y > 0.004에서