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HR-TEM and FIB-SEM characterization of formation of eutectic-like structure from amorphous GdAlO_3-Al_2O_3 system

中国有色金属学会会刊：英文版 2012年第S3期22卷 579-584页

作者： Y.H.HAN Y.HARADA J.F.SHACKELFORD jaehyung lee K.KAKEGAWA School of Materials Science and Engineering Yeungnam University Department of Chemical Engineering and Materials Science University of California at Davis Graduate School of Engineering Chiba University

The crystallization process of the eutectic composition of GdAlO_3-Al_2O_3 from the amorphous phase prepared by rapid-quenching of melt that leads to the formation of a cantaloupe skin-like microstructure was investigated using focused ion-beam scanning electron microscopy (FIB-SEM) and high-resolution transmission electron microscopy (HR-TEM).The amorphous films were heat-treated at temperatures between 1000 °C and 1500 °C for up to 30min to form the eutectic phases of GdAlO_3 and Al_2O_*** GdAlO_3 and Al_2O_3 crystal phases that formed from the amorphous phase were identified by FIB-SEM and *** components began to crystallize and grow from the amorphous phase separately at different *** formation process of these crystal phases was different from that of the ordinary eutectic microstructure solidified from the GdAlO_3-Al_2O_3 ***,the observed structure is termed "eutectic-like" for *** microstructures formed from the amorphous phases at sufficiently high temperatures consisted of ultra-fine microstructures of individually crystallized components and were similar to ordinary eutectic *** heat-treating the amorphous films at 1500 °C for either 2 min,8min or 30min,the ultra-fine components of GdAlO_3 and Al_2O_3 were found to crystallize following a eutectic-like stage after 8min of heat treatment.

关键词： eutectic amorphous GdAlO3-Al2O3 eutectic-like HR-TEM FIB-SEM Crystallization

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Fabrication of SiCw/Ti3SiC2 composites with improved thermal conductivity and mechanical properties using spark plasma sintering

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Journal of Advanced Ceramics 2020年第4期9卷 462-470页

作者： Xiaobing Zhou Lei Jing Yong Duk Kwon Jin-Young Kim Zhengren Huang Dang-Hyok Yoon jaehyung lee Qing Huang Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China School of Materials Science and Engineering Yeungnam UniversityGyeongsan38541Republic of Korea Union Materials Corporation Daegu42710Republic of Korea

High strength SiC whisker-reinforced Ti3SiC2 composites(SiCw/Ti3SiC2)with an improved thermal conductivity and mechanical properties were fabricated by spark plasma *** bending strength of 10 wt%SiCw/Ti3SiC2 was 635 MPa,which was approximately 50%higher than that of the monolithic Ti3SiC2(428 MPa).The Vickers hardness and thermal conductivity(k)also increased by 36%and 25%,respectively,from the monolithic Ti3SiC2 by the incorporation of 10 wt%*** remarkable improvement both in mechanical and thermal properties was attributed to the fine-grained uniform composite microstructure along with the effects of incorporated *** SiCw/Ti3SiC2 can be a feasible candidate for the in-core structural application in nuclear reactors due to the excellent mechanical and thermal properties.

关键词： SiC whisker Ti3SiC2 mechanical property thermal conductivity spark plasma sintering

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Usefulness of CA 19–9 for pancreatic cancer screening in patients with new-onset diabetes

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Hepatobiliary & Pancreatic Diseases International 2018年第3期17卷 263-268页

作者： Jung Wan Choe Hyo Jung Kim Jae Seon Kim jaehyung Cha Moon Kyung Joo Beom Jae lee Jong-Jae Park Young-Tae Bak Department of Internal Medicine Korea University College of MedicineSeoul 08308Korea Department of Biostatistics Korea University Medical CenterSeoul 08308Korea

Background： Generally, carbohydrate antigen 19–9 （CA 19–9） is not useful for screening pancreatic cancerin the asymptomatic general population. This study aimed to evaluate the utility of CA 19–9 level as a scre... 详细信息

关键词： Diabetes mellitus Pancreatic neoplasms Early detection of cancer Carbohydrate antigen 19-9 Bilirubin

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Sex-based differences in histology,staging,and prognosis among 2983 gastric cancer surgery patients

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World Journal of Gastroenterology 2022年第9期28卷 933-947页

作者： Yonghoon Choi Nayoung Kim Ki Wook Kim Hyeong Ho Jo jaehyung Park Hyuk Yoon Cheol Min Shin Young Soo Park Dong Ho lee Hyeon Jeong Oh Hye Seung lee Young Suk Park Sang-Hoon Ahn Yun-Suhk Suh Do Joong Park Hyung-Ho Kim Ji-Won Kim Jin Won Kim Keun-Wook lee Won Chang Ji HoonPark Yoon Jin lee Kyoung Ho lee Young Hoon Kim Department ofInternal Medicine Seoul National University Bundang HospitalSeongnam 13620South Korea Nayoung Department of Internal Medicine Seoul National University College of MedicineSeoul 03080South Korea Department of Pathology Seoul National University Bundang HospitalSeongnam 13620South Korea Department of Pathology Seoul National University College of MedicineSeoul 03080South Korea Department of Surgery Seoul National University Bundang HospitalSeongnam 13620South Korea Department of Surgery Seoul National University College of MedicineSeoul 03080South Korea Department of Radiology Seoul National University Bundang HospitalSeongnam 13620South Korea Department of Radiology Seoul National University College of MedicineSeoul 03080South Korea

BACKGROUND Few studies have been conducted on sex differences in the incidence, pathophysiology, and prognosis of gastric cancer(GC).AIM To analyze the differences in GC characteristics according to sex in patients who underwent surgical treatment for *** A total of 2983 patients diagnosed with gastric adenocarcinoma who received surgical treatment at the Seoul National University Bundang Hospital between 2003 and 2017 were *** clinicopathological characteristics, histologic type of GC, overall and GC-specific survival rates, and associated risk factors were *** Among the 2983 patients, 2005(67.2%) and 978(32.8%) were males and females, *** average age of the female group(59.36 years) was significantly younger than that of the male group(61.66 years;P < 0.001).Cancer of the gastric body(P < 0.001) and diffuse-type histology(P < 0.001) were more common in females than in *** trend was more prominent in females younger than 60 years of age, with a significantly higher proportion of diffuse-type cancer than in the male *** of sex, diffuse-type GC was more common in younger patients, and the proportion of intestinal-type GC increased with *** overall survival rate was significantly higher in females(P < 0.001).However, this difference disappeared for GC-specific survival(P = 0.168), except for the poor GC-specific survival rate in advanced-stage cancer(stage Ⅲ or above) in females(P = 0.045).The risk factors for GC-related mortality were older age, upper location of GC, and diffuse-or mixed-type *** terms of comorbidities, more males died from diseases other than GC, including other malignancies such as lung cancer, hepatocellular carcinoma, and pancreatic cancer, and respiratory diseases such as interstitial lung disease and chronic obstructive pulmonary disease, while there were relatively more cardiovascular or cerebrovascular deaths in *** Sex-based differences in GC were

关键词： Gastric cancer Histology Prognosis Sex difference Survival

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