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| 1 | Effects of Alumina on Cristobalite Crystallization and Properties of Silica-Based Ceramic Cores显示文摘In this work, the influences of alumina addition on cristobalite crystallization and properties of injection molded silica-based ceramic cores were investigated. X-ray diffraction(XRD) was used to characterize phase transformations in the samples, and the XRD result indicated that the addition of alumina promoted crystallization of fused silica during sintering at 1180–1220 °C and thus increases the amount of cristobalite. The increased amount of cristobalite as well as alumina addition led to much more thermal dilation due to their higher coefficients of thermal expansion than that of fused silica. The flexural strengths at room temperature and 1500 °C were tested, and it was shown that alumina addition could not affect room temperature strength, but decreased the flexural strength at 1500 °C. In addition, deflection resistance during heating to high temperatures was investigated, and the result indicated that alumina addition speeded up high temperature softening of the samples. XRD and scanning electron microscopy equipped with energy dispersive spectrometry(SEM/EDS) analysis suggested that this softening behavior was related with viscous flow sintering which could be accelerated by the reaction of alumina and silica with a product of mullite. | J.J.Liang Q.H.Lin X.Zhang T.Jin Y.Z.Zhou X.F.Sun B.G.Choi I.S.Kim J.H.Do C.Y.Jo | 2017 | Journal of Materials Science & Technology2017，33，2： | 14 |
| 2 | Microstructural Evolution in Directionally Solidified Ni-Base Superalloy IN792+Hf显示文摘微结构进化在 gamma'precipitates 和 MC 类型碳化物上与一个重音在 Ni 底超级合金 IN792+Hf 的方向性的团结(DS ) 期间被调查了。量的图象分析表明团结的增加在 178 K/cm 的经常的热坡度评价直到 100 亩 m/s 导致了罚款和在当演员组 7'size 和冷却的率之间的 gamma'precipitates.The 关系的一致分发也为 DS IN792+Hf.In 被决定吝啬的时间,当 MC 碳化物的区域部分被 S/L 接口形态学显著地影响时, MC 碳化物尺寸被发现两个都依赖于团结率和 S/L 接口形态学。 | S.M.Seo I.S.Kim J.H.Lee C.Y.Jo H.Miyahara K.Ogi | 2008 | Journal of Materials Science & Technology2008，24，1： | 3 |
| 3 | Dielectric Properties of A-site Deficient Perovskite-type Lanthanum-calcium-titanium Oxide Solid Solution System显示文摘 | I.S.Kim W H Jung Y Inaguma | | 0，，03： | 1 |
| 4 | Steeply sloped UWB bandpass filer based on stub-loadded resonator显示文摘 | T.H.Duong I.S.Kim | | 0，，： | 1 |
| 5 | Development of mathematical model with a genetic algorithm for automatic arc welding process显示文摘This paper is to represent new algorithms to predict process parameters on top-bead width in robotic gas metal arc(GMA) welding process.The models have been developed:linear, curvilinear and intelligent model based on full factorial design with two replications.Regression analysis was employed for optimization of the coefficients of linear and curvilinear models, while genetic algorithm(GA) was utilized to estimate the coefficients of an intelligent model.Not only the fitting of these models were checked and compared by using a variance test(ANOVA), but also the prediction on top-bead width using the developed models were carried out based on the additional experiments.The developed models were employed to investigate the characteristic between process parameters and top-bead width.Resulting solutions and graphical representation showed that the intelligent model developed can be employed for prediction of bead geometry in GMA welding process. | D.T.Thao I.S.Kim J.W.Jeong J.H.Lee J.Y.Shim H.H.Kim | 2010 | Acta Metallurgica Sinica(English Letters)2010，23，3： | 0 |
| 6 | STUDY ON THE TENSILE FATIGUE DAMAGE OF QUASI-ISOTROPIC COMPOSITE LAMINATES显示文摘Quasi-isotropic laminates have isotropic elastic properties in all in-plane directions.Therefore, this kind of laminate is widely used for structural elements. The simpleststacking sequence of quasi-isotropic laminates is [0/-60/60]s. When the direction ofapplied axial load to [0/-60/60]s laminate is inclined at a 30-degree angle, we havethe other quasi-isotropic laminate [30/-30/90]s under axial load. The failure mecha-nisms of these two laminates are, however, entirely different from each other becausethese two laminates have different distribution of the interlaminar stresses. It wasconfirmed by tensile fatigue tests that the [0/-60/60]s laminate does not show any vis-ible fatigue damage, but the [30/-30/90]s laminate develops edge-delamination duringcyclic loading. The analytical results were in good agreement with the experimental results. | I.G.Kim I.S.Kim O.S.Kim YaragarraK.D.V.Prasad | 2003 | Acta Metallurgica Sinica(English Letters)2003，16，1： | 0 |
| 7 | 热暴露下预应变对CMSX-4单晶高温合金的显微组织演变的影响(英文)显示文摘在室温下,对经完全热处理的第二代单晶高温合金CMSX-4实施压缩和拉伸预应变。压缩和拉伸预应变在单晶CMSX-4中产生了剪切带。单晶CMSX-4在950℃下热暴露10h,沿剪切带产生了γ′粒子择优粗化。剪切带上的γ′粒子逐渐侵入γ通道。最后,γ通道沿着剪切带消失。TCP状粒子伴随着γ通道的消失而出现。然而,热暴露10h的普通单晶CMSX-4没有产生TCP沉淀,也没有γ′粒子择优粗化。热暴露100h的预应变CMSX-4沿剪切带产生了γ′粒子和TCP相粒子择优粗化,基体中也有γ′粒子粗化。 | B.G.CHOI C.Y.JO I.S.KIM S.M.SEO H.M.KIM | 2011 | Transactions of Nonferrous Metals Society of China2011，21，6： | 0 |
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