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Influence of Phase Constitution on Mechanical Performance of 12Ce-3Y-Zro_2/2.5 wt pct Al_(2)o_(3) Composites

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Journal of Materials Science & Technology 2004年第3期20卷 284-286页

作者： ShuigenHUANG LinLI J.vleugels o.v.d.biest SchoolofMaterialsScienceandEngineering.ShanghaiUniversity Shanghai200072China departmentofMTM KatholiekeUniversiteitLeuvenB-3001HeverleeBelgium

The phase constitution of a composite consisting of 12 at. pct Ceo_2-3 at. pct Y_2o_3-Zro_2/2.5 wt pct Al_2o_3 (3Y12Ce2.5Al)was determined by thermodynamic calculation. It is a combination of 36.9 at. pct cubic phase and 63.1 at. pct tetragonalphase at 1450℃. Green compacts were fabricated by cold isostatic pressing with powder synthesized by coating technique,and pressureless sintered at 1450℃. The fracture toughness and vickers hardness, evaluated by the micro-indentation method,are 2.02 MPa·m^(1/2) and 11.395 GPa, respectively. The addition of 3 at. pct Y_2o_3 to 12 at. pct Ceo_2-Zro_2 ceramic leads todrastically decrease in toughness compared to composites without yttria stabilizer. No monoclinic phase is detected on thesudece of all the ground samples. The high content of cubic phase and lack of phase transformation can be attributed to thelow toughness based on the thermodynamic prediction.

关键词： Thermodynamics Mechanical properties Zro_2-Ceo_2-Y_2o_3

Study of Thermodynamic Properties of Nonstoichiometric Phase o_(2-x)> with Compound Energy Model

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Journal of Materials Science & Technology 2002年第5期18卷 422-426页

作者： ShuigenHUANG LinLI o.v.d.biest J.vleugels PeilingWANG Sch. of Mat. Sci. and Eng. Shanghai Univ. Shanghai 200072 China dept. MTM Katholieke Univ. Leuven B-3001 Heverlee Belgium Shanghai Inst. of Ceramics Chinese Acad. of Sci. Shanghai 200050 China

Using compound energy model (CEM), the thermodynamic properties of and were evaluated. The evaluation was based on the optimization of ZrIo2-Ceo2 and Zro2-Ceo1.5 systems, as well as the miscibility gap in Ceo1.5-Ceo... 详细信息

Using compound energy model (CEM), the thermodynamic properties of o2-y> and o2-x> were evaluated. The evaluation was based on the optimization of ZrIo2-Ceo2 and Zro2-Ceo1.5 systems, as well as the miscibility gap in Ceo1.5-Ceo2 system. Except the cubic fluorite structure phase assessed with compound energy model, all the other solution phases were assessed with subsitutional solution model. The model parameters were evaluated through fitting the selected experimental data by means of thermodynamic optimization. A set of parameters with thermodynamics self-consistency was obtained and satisfactorily described the complex relation between y in o2-y> and the partial pressure of oxygen at different temperatures, also the interdependence among miscellaneous factors such as temperature, oxygen partial pressure, the reduction amount of Ceo2 as well as the nonstoichiometry in cubic phase o2-x>- The calculated results seem to be reasonable when put into the explanation of pressureless sintering of Ce02-stabilized Zro2 powder compacts at a controlled oxygen partial pressure.

关键词： Zirconia Ceria Nonstoichiometry Thermodynamic

Thermo dynamic Assessment and Microstructure of the Zro2-Ceo2-Al2o3 System

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Journal of Materials Science & Technology 2004年第1期20卷 75-78页

作者： ShuigenHUANG LinLI J.vleugels o.v.d.biest PeilingWANG SchoolofMaterialsScienceandEngineering ShanghaiUniversityShanghai200072China departmentofMTM KatholiekeUniversiteitLeuvenB-3001HeverleeBelgium StateKeyLaboratoryofHighPerformanceCeramicsandSuperfineMicrostructure ShangHaiInstituteofCeramicsChineseAcademyofSciencesShanghai200050China

The Zro2-Ceo2-AI2o3 system has been assessed with the CALPHAd (Calculation of Phase diagrams) technique using the PARRoT procedure. The experimental information on the Zro2-AI2o3, AI2o3-Ceo2 systems as well as the isothermal sections of the ternary system at 1673 K and 1873 K is well reproduced. According to the assessed isothermal section at 1723 K, no alumina dissolves into the tetragonal zirconia phase. Specimens with different alumina content are fabricated from commercial 12 mol pct Ceo2-stabilized Zro2 powder (12Ce-Zro2). The thermodynamic properties are consistent with the observed microstructure, which present a combination of tetragonal phase and alumina grains.

关键词： Ce-TZP A12o3 Thermodynamics

New Method for the Calculation of Stable Phase diagrams

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Advances in Manufacturing 1997年第1期1卷 75-78页

作者：李麟 L.delaey P.Wollants o.v.d.biest School of Materials Sci. & Eng. Shanghai University Shanghai dept.MTM Katholieke Universiteit Leuven Heverlee Belgium

Numerical methods commonly used for the calculating phase diagrams were listed. A new method to calculate stable phase diagrams was presented which possesse the advantages of both the New-ton Raphson method and the simplex method. This method is suitable for the calculation of the stable equilibria in complicated systems. For example. calculated results in comparison with experimental results as well as the prediction of new systems were shown in the present work

关键词： numerical method phase diagram calculation

Study of Thermodynamic Properties of Nonstoichiometric Phase 1-zCezo2-x> with Compound Energy Model 附视频

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Journal of Materials Science & Technology 2002年第5期 422-426页

作者： ShuigenHUANG ,LinLI ,o.v.d.biest ,J.vleugels ,PeilingWANG

Using compound energy model (CEM), the thermodynamic properties ofandwere evaluated. The evaluation was based on the optimization of Zro2-Ceo2 and Zro2-Ceo1.5 systems, as well as the miscibility gap in Ceo1.5-Ceo2 system. Except the cubic fluorite structure phase assessed with compound energy model, all the other solution phases were assessed with subsitutional solution model. The model parameters were evaluated through fitting the selected experimental data by means of thermodynamic optimization. A set of parameters with thermodynamics self-consistency was obtained and satisfactorily described the complex relation between y inand the partial pressure of oxygen at different temperatures, also the interdependence among miscellaneous factors such as temperature, oxygen partial pressure, the reduction amount of Ceo2 as well as the nonstoichiometry in cubic phase. The calculated results seem to be reasonable when put into the explanation of pressureless sint

关键词： Zirconia Ceria Nonstoichiometry Thermodynamic

Zro_2-Yo_(1.5)-Ceo_2体系的相图估算

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上海大学学报（自然科学版） 2000年第4期6卷 303-306页

作者：黄水根李麟 o.v.d.biest 王佩玲孙维莹上海大学材料科学与工程学院上海200072 比利时鲁汶大学材料系中科院上海硅酸盐研究所上海200050

利用置换溶液模型优化计算了 Yo1 .5 - Ce o2 二元系的相图 ,并得到了估算的热力学参数 .结合以前优化的Zr o2 - Ce o2 和 Zr o2 - Yo1 .5 二元系 ,并根据 Bonnier方法进行外推 ,估算了 Zr o2 - Yo1 .5 - Ce o2 三元系在 1973K和 1873K... 详细信息

利用置换溶液模型优化计算了 Yo1 .5 - Ce o2 二元系的相图 ,并得到了估算的热力学参数 .结合以前优化的Zr o2 - Ce o2 和 Zr o2 - Yo1 .5 二元系 ,并根据 Bonnier方法进行外推 ,估算了 Zr o2 - Yo1 .5 - Ce o2 三元系在 1973K和 1873K下的等温截面相图 ,其结果与试验结果较吻合 .

关键词：热力学氧化锆氧化钇氧化铈相图陶瓷材料

MicroRNAs as potential diagnostic biomarkers for bipolar disorder

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Neural Regeneration Research 2025年第6期20卷 1681-1695页

作者： Bridget Martinez Philip v.Peplow department of Pharmacology University of Nevada-RenoRenoNVUSA department of Medicine University of Nevada-RenoRenoNVUSA department of Anatomy University of OtagoDunedinNew Zealand

Abnormal expression of microRNAs is connected to brain development and disease and could provide novel biomarkers for the diagnosis and prognosis of bipolar disorder. We performed a PubMed search for microRNA biomarkers in bipolar disorder and found 18 original research articles on studies performed with human patients and published from January 2011 to June 2023. These studies included microRNA profiling in bloodand brain-based materials. From the studies that had validated the preliminary findings,potential candidate biomarkers for bipolar disorder in adults could be miR-140-3p,-30d-5p,-330-5p,-378a-5p,-21-3p,-330-3p,-345-5p in whole blood, miR-19b-3p,-1180-3p,-125a-5p, let-7e-5p in blood plasma, and miR-7-5p,-23b-5p,-142-3p,-221-5p,-370-3p in the blood serum. Two of the studies had investigated the changes in microRNA expression of patients with bipolar disorder receiving treatment. one showed a significant increase in plasma miR-134 compared to baseline after 4 weeks of treatment which included typical antipsychotics, atypical antipsychotics, and benzodiazepines. The other study had assessed the effects of prescribed medications which included neurotransmitter receptorsite binders(drug class B) and sedatives, hypnotics, anticonvulsants, and analgesics(drug class C) on microRNA results. The combined effects of the two drug classes increased the significance of the results for miR-219 and-29c with miR-30e-3p and-526b* acquiring significance. MicroRNAs were tested to see if they could serve as biomarkers of bipolar disorder at different clinical states of mania, depression, and euthymia. one study showed that upregulation in whole blood of miR-9-5p,-29a-3p,-106a-5p,-106b-5p,-107,-125a-3p,-125b-5p and of miR-107,-125a-3p occurred in manic and euthymic patients compared to controls, respectively, and that upregulation of miR-106a-5p,-107 was found for manic compared to euthymic patients. In two other studies using blood plasma,downregulation of miR-134 was observed i

关键词： biomarker bipolar disorder blood leukocytes blood plasma blood plasma extracellular vesicles/exosomes blood serum brain tissue brain tissue extracellular vesicles/exosomes lymphoblastoid cell lines microRNA neural progenitor cells whole blood

Autism spectrum disorder:difficulties in diagnosis and microRNA biomarkers

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Neural Regeneration Research 2025年第10期20卷 2776-2786页

We performed a PubMed search for microRNAs in autism spectrum disorder that could serve as diagnostic biomarkers in patients and selected 17 articles published from January 2008 to december 2023,of which 4 studies were performed with whole blood,4 with blood plasma,5 with blood serum,1 with serum neural cell adhesion molecule L1-captured extracellular vesicles,1 with blood cells,and 2 with peripheral blood mononuclear *** of the studies involved children and the study cohorts were largely *** of the studies had performed microRNA sequencing or quantitative polymerase chain reaction assays to measure microRNA *** five studies had used real-time polymerase chain reaction assay to validate microRNA expression in autism spectrum disorder subjects compared to *** microRNAs that were validated in these studies may be considered as potential candidate biomarkers for autism spectrum disorder and include miR-500a-5p,-197-5p,-424-5p,-664a-3p,-365a-3p,-619-5p,-664a-3p,-3135a,-328-3p,and-500a-5p in blood plasma and miR-151a-3p,-181b-5p,-320a,-328,-433,-489,-572,-663a,-101-3p,-106b-5p,-19b-3p,-195-5p,and-130a-3p in blood serum of children,and miR-15b-5p and-6126 in whole blood of *** important limitations were identified in the studies reviewed,and need to be taken into account in future *** studies are warranted with children and adults having different levels of autism spectrum disorder severity and consideration should be given to using animal models of autism spectrum disorder to investigate the effects of suppressing or overexpressing specific microRNAs as a novel therapy.

关键词： autism spectrum disorder biomarker blood cells blood plasma blood serum diagnosis microRNA peripheral blood mononuclear cells serum neural cell adhesion molecule L1-captured extracellular vesicles whole blood

MicroRNAs as potential biomarkers for diagnosis of post-traumatic stress disorder

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Neural Regeneration Research 2025年第7期20卷 1957-1970页

Post-traumatic stress disorder is a mental disorder caused by exposure to severe traumatic life ***,there are no validated biomarkers or laboratory tests that can distinguish between trauma survivors with and without post-traumatic stress *** addition,the heterogeneity of clinical presentations of post-traumatic stress disorder and the overlap of symptoms with other conditions can lead to misdiagnosis and inappropriate *** suggests that this condition is a multisystem disorder that affects many biological systems,raising the possibility that peripheral markers of disease may be used to diagnose post-traumatic stress *** performed a PubMed search for microRNAs(miRNAs)in post-traumatic stress disorder(PTSd)that could serve as diagnostic biomarkers and found 18 original research articles on studies performed with human patients and published January 2012 to december *** included four studies with whole blood,seven with peripheral blood mononuclear cells,four with plasma extracellular vesicles/exosomes,and one with serum *** of these studies had also used whole *** studies were excluded as they did not involve microRNA *** of the studies had collected samples from adult male veterans who had returned from deployment and been exposed to combat,and only two were from recently traumatized adult *** measuring miRNA expression levels,many of the studies had used microarray miRNA analysis,miRNA Seq analysis,or NanoString *** six studies had used real time polymerase chain reaction assay to determine/validate miRNA expression in PTSd subjects compared to *** miRNAs that were found/validated in these studies may be considered as potential candidate biomarkers for PTSd and include miR-3130-5p in whole blood;miR-193a-5p,-7113-5p,-125a,-181c,and-671-5p in peripheral blood mononuclear cells;miR-10b-5p,-203a-3p,-4488,-502-3p,-874-3p,-5100,and-7641 in plasma extracellular vesicles/

关键词： biomarker diagnosis microRNA peripheral blood mononuclear cells plasma extracellular vesicles/exosomes post-traumatic stress disorder serum exosomes whole blood whole plasma