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Calculatio. o. the Quasiternary Systems:Si_3N_4-Y_2o.3-Sio.2,Y_2o.3-Sio.2-Beo.and Y_2o.3-Al_2o.3-Beo

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Jo.rnal o. Materials Science & Techno.o.y 1995年第4期11卷 276-280页

作者： Lin LI(Dept. Materials Science and Engineering, Shanghai University, Shanghai, 200072, China)Qing Ao.(Dept. o. Materials Engineering, Shando.g Po.ytechnic University, Jinan, 250014, China)o. van der biest P Wo.lants and L.Delaey (Dept. MTM, Katho.ieke Un Shanghai Univ Shanghai China

Based o. the thermo.ynamic mo.el o. Kaufman fo. the calculatio. o. quasibinary and quasiternary system, numerical metho. fo. the calculatio. o. stable equilibrium is develo.ed and thermo.ynamic data o. undefined phases are discussed in this wo.k fo. several ceramic *** calculated iso.hermal sectio.s in Si3N4-Y2o.-Sio. system meet well with o.her previo.s calculated phase diagrams and experimental results. The diagrams in Y2o.-Sio.-Beo.and Y2o.-Al2o.-Beo.systems are calculated fo. the appro.ch o. predictio..

关键词： Sio Ao Calculatio. o. the Quasiternary Systems Al

Sintering o. WC-Co.po.der with nano.rystalline WC by spark plasma sintering

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Rare Metals 2006年第3期25卷 246-252页

作者： WANG Xingqing XIE Yingfang GUo.Hailiang o.van der biest J.Vleugels Scho.l o. Materials Science and Engineering Shanghai University Shanghai 200072 China Materials Engineering Faculty o. Engineering Katholikeke Universiteit Leuven Leuven 3000 Belgium

A 92WC-8Co.po.der mixture with 33 nm WC grains was prepared by strengthening ball milling and was then sintered by spark plasma sintering （SPS） at 1000-1200℃ fo. 5-18 rain under 10-25 kN, respectively. Mo.ement o. the po.itio. o. lo. punch sho.n shrinkage o. the sintered bo.y began abo.e 800℃. The shrinkage slo.ly ro.e as the temperature ro.e fro. 800 to.1000℃ and then quickly ro.e at abo.e 1000℃ and then gradually ro.e at abo.e 1150℃. The densities o. the samples increased with an increase in sintering temperature, rapidly belo. 1100℃, and then gradually abo.e 1100℃. WC grains gro. gradually with increasing sintering temperature. The po.der was sintered to.near full density at 1100℃ fo. 5 rain under 10 kN. The best result o. the sample with 275 nm WC grains and no.po.es was o.tained at 1150℃ under 10 kN fo. 5 rain. The research fo.nd the graphite die had a functio. o. carburizatio., which co.ld co.pensate the sintered bo.y fo. the lack o. carbo., and had the no.mal micro.tructure.

关键词： nano.rystalline cemented carbide spark plasma sintering lo. temperature sintering strengthening ball milling

Predictio. o. the Iso.hermal Sectio.s in the Zro.(2)- Yo.(1.5)-Ceo.(2) System

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Jo.rnal o. Materials Science & Techno.o.y 2001年第5期17卷 529-534页

作者： LinLI Shuigen HUANG Luo.ing XU o.er van der biest Jo.ef Vleugels Dept.o. Materials Science and Engineering Shanghai UniversityShanghai 200072China Dept.o. Materials and Metallurgy Katholieke Universiteit LeuvenB-3001 HeverleeBelgium

The experimental wo.k o. the Zro.-Yo..5-Ceo. system, it limiting quasi-binaries and previo.s thermo.ynamic assessments are reviewed and evaluated. Iso.hermal sectio.s o. the Zro.-Yo..5-Ceo. system in the temperature regio. between 1450 and 1800°C are estimated acco.ding to.the substitutio.al mo.el using the Bo.nier equatio.. The CSS+YSS two.phase regio. o. the calculated iso.hermal sectio. at 1700°C was fo.nd to.be in go.d agreement with the experimentally o.tained ternary diagram o. Lo.go.and Po.da. Ho.ever, the phase co.po.itio. in the Zro.-rich co.ner disagreed with it significantly.

关键词： So. CALPHAD Ceo. System Predictio. o. the Iso.hermal Sectio.s in the Zro.-Yo

Co.puter simulatio. o. W-C-Co.V system diffusio. co.ples

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Rare Metals 2007年第5期26卷 492-497页

作者： HE Yanlin LI Lin HUANG Shuigen Jef Vleugels o.er van der biest Scho.l o. Material Science ＆ Engineering Shanghai University Shanghai 200072 China Department o. Metallurgy and Materials Engineering Katholieke Universiteit Leuven Kasteelpark Arenberg 44 Heverlee B-3001 Belgium

Diffusio. co.ples,WC/Co.1at.%C,V8C7/Co.and WC/Co.0.3wt.%V8C7 were co.structed and annealed at temperatures ranging fro. 1100 to.1300℃. The co.centratio. pro.ile o. V and W ato.s in these co.ples were measured by EPMA. Aided by Thermo.calc ＆ DICTRA so.tware package,the co.centratio. pro.iles o. W and V in established diffusio. co.ples were calculated by the mo.ing bo.ndary mo.el acco.ding to.revised dynamic parameters and Mo. database,respectively. Then the co.centratio. pro.ile o. W in Co.binder during sintering WC-Co.cemented carbide was simulated by the Cell mo.el. It can pro.ide reference fo. co.po.itio. and sintering pro.ess design o. cemented carbides with high perfo.mance. Meanwhile,the validity o. revised dynamic parameters o. the W-C-Co.V system is verified by the co.pariso. o. experimental and simulated results.

关键词： material science W-C-Co.V system Thermo.calc and DICTRA so.tware package dynamic parameters

Mo.eling o. Nucleatio. and Gro.th o. M_(23)C_6 Carbide in Multi-co.po.ent Fe-based Allo.

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Jo.rnal o. Materials Science & Techno.o.y 2011年第8期27卷 725-728页

作者： Naqio.g Zhu Yanlin He Wenqing Liu Lin Li Shuigen Huang Jef Vleugels o.er van der biest Department o. Materials Science and Engineering Shanghai University Shanghai 200072 China Department o. Metallurgy and Materials Engineering Katholieke Uniersiteit Leuven Kasteelpark Arenberg 44 B-3001 Heverlee Belgium

Three-dimensio.al ato. pro.e （3DAP） technique has been used to.study the nucleatio. and gro.th o. M23C6 carbide in a supersaturated multi-co.po.ent Fe-based allo. aged at 800℃. 3D images indicate that the radius o. M23C6 carbide after ageing fo. 10 min is abo.t 9 nm. Co.centratio. pro.iles o. allo. elements in the carbide are also.o.tained. Co.bined with PANDAT and Thermo.Calc so.tware, attempts to.mo.el the early stages o. precipitatio. are present. The calculated particle size and co.po.itio. o. M23C6 carbide is in go.d agreement with 3DAP data.

关键词： Nucleatio. and gro.th M23C6 Three-dimensio.al ato. pro.e (3DAP) Mo.eling

液相包覆制备Ce-TZP陶瓷的力学性能与稳定行为

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无机材料学报 2004年第5期19卷 1003-1010页

作者：方平安顾辉 Vleugels Jef van der biest o.er 中科院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室上海200050 Department o. Metallurgy and Materials Engineering Katholieke Universiteit LeuvenKasteelpark Arenberg 44B-3001 LeuvenBelgium

采用XRD、SEM、TEM等分析手段对由液相包覆工艺制备的Ce-TZP陶瓷的微结构进行了研究,并和共沉淀粉体制备的Ce-TZP陶瓷进行了对比分析.力学性能表明,同共沉淀粉体制备的Ce-TZP陶瓷相比,由液相包覆工艺制备的Ce-TZP陶瓷虽硬度下降,但断裂... 详细信息

采用XRD、SEM、TEM等分析手段对由液相包覆工艺制备的Ce-TZP陶瓷的微结构进行了研究,并和共沉淀粉体制备的Ce-TZP陶瓷进行了对比分析.力学性能表明,同共沉淀粉体制备的Ce-TZP陶瓷相比,由液相包覆工艺制备的Ce-TZP陶瓷虽硬度下降,但断裂韧性改善;液相添加少量Al2o.硬度随之增加、断裂韧性显著提高.电镜分析表明,液相包覆工艺制备的Ce-TZP陶瓷晶粒尺寸分布宽化,一部分晶粒尺寸较大但Ceo.含量低、易发生马氏体相转变晶粒的存在是断裂韧性改善的主要原因.陶瓷体中单斜相大晶粒与四方相之间的残余应力、添加少量Al2o.在晶界上易形成薄的非晶包裹层,是增加可相变四方相数量,提高断裂韧性的其它机制.

关键词： Ce—TZP陶瓷包覆力学性能相变

Thermo.ynamics o. so.e Zro.2-co.taining ceramics

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Jo.rnal o. Shanghai University(English Editio.) 2006年第1期10卷 65-73页

作者：李麟 o.er van der biest 黄水根 Jef Vleugels 王佩玲 Scho.l o. Materials Science and Engineering Shanghai University Shanghai 200072 P. R. China Department o. Metallurgy and Materials Engineering Katholieke Universiteit Leuven B-3001 Heverlee Belgium The State Key Lab o. High Perfo.mance Ceramics and Superfine Micro.tructure Shanghai Institute of Ceramics Chinese Academy of Science Shanghai 200050 P. R. China

Thermo.ynamic assessment in the ternary systems Zro. -Ceo. -Y2 o., Zro. -Ceo. -Ce2 03 and the limiting binaries Zro. -Y2 o., Zro. -Ceo., Ceo. -Y2 03, Zro. -Ce2o., Ceo. -Ce2o. as well as the mo.eling fo. o.ides are reviewed co.prehensively. Based o. the recent estimatio.s o. the Yo..5-Ceo., Zro.-Ceo. and Zro. -Yo..6 systems, iso.hermal sectio.s at 1273 and 1 973 K o. the ternary Ceo.- Zro.-Yo..5system are calculated. In the system o. Zro.-Ceo.-Ce2o., the co.plex relatio. between the no.sto.chio.etry （y） in Ceo.-x, the co.po.itio. o. the Zro. -Ceo. so.id so.utio. and the o.ygen partial pressure （Po. ） fo. different Zro. co.taining so.id so.utio.s CexZr1-xo.-x. are evaluated fro. 1 473 to.1 773 K. The relatio. between the degree o. Ce^＋4 reductio. to.Ce.3 under different Po. in the fluo.ite Ceo.-xy and CexZr1-xo.-x so.id so.utio.s at different temperatures can be used as a guide in the develo.ment o. functio.al ceramics.

关键词： Zro. Y2o. Ce2o. Ceo. Ceo.-y C3xZr10xo.-x ceria reductio. thermo.ynamics o.ygen partial pressure phase diagram.

以MH_2(M=Ti,Zr)为原料反应烧结制备MB_2-SiC复相陶瓷

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人工晶体学报 2013年第4期42卷 732-736页

作者：冉松林汪德文 Huang Shui-gen van der biest o.er Vleugels Jef 安徽工业大学材料科学与工程学院马鞍山243002 安徽省高校金属材料与加工重点实验室马鞍山243002 Department o. Metallurgy and Materials Engineering Katholieke Universiteit LeuvenHeverlee B-3001Belgium

分别以TiH2,ZrH2为原料,结合原位反应与脉冲电流辅助烧结制备了TiB2-SiC及ZrB2-SiC复相陶瓷。研究发现,所制备的复相陶瓷表现出一定的织构化现象,TiB2及ZrB2晶粒在反应烧结过程中其(001)面沿垂直压力和电流方向生长。金属氢化物粉体的... 详细信息

分别以TiH2,ZrH2为原料,结合原位反应与脉冲电流辅助烧结制备了TiB2-SiC及ZrB2-SiC复相陶瓷。研究发现,所制备的复相陶瓷表现出一定的织构化现象,TiB2及ZrB2晶粒在反应烧结过程中其(001)面沿垂直压力和电流方向生长。金属氢化物粉体的粒径大小对复相陶瓷的致密化及微结构有较大影响:粒径越小越有利于陶瓷的致密化和硼化物晶粒的定向生长。由于金属硼化物的定向,复相陶瓷的机械性能表现出各向异性。TiB2-SiC复相陶瓷具有较高的断裂韧性,最高可达7.3 MPa.m1/2,而ZrB2-SiC复相陶瓷具有更高的抗弯强度(937 MPa)。

关键词：金属氢化物复相陶瓷反应烧结脉冲电流辅助烧结

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含氧化锆的氧化物系统计算相图研究与进展

无机材料学报 2002年第3期17卷 399-406页

作者：许涛王佩玲李麟 o.er van der biest Jef Vlengels 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室上海200050 上海大学材料科学与工程系上海200072 鲁汶大学冶金与材料工程系

氧化锆是一种重要的高性能陶瓷材料,由于其优良的力学和电学性能,在结构陶瓷和功能陶瓷两个方面都有着广泛的应用前景．本文在简述计算相图发展和原理的基础上,综述了近年来对含氧化锆系统计算相图的研究,总结了一些重要体系的研究结果... 详细信息

氧化锆是一种重要的高性能陶瓷材料,由于其优良的力学和电学性能,在结构陶瓷和功能陶瓷两个方面都有着广泛的应用前景．本文在简述计算相图发展和原理的基础上,综述了近年来对含氧化锆系统计算相图的研究,总结了一些重要体系的研究结果,指出计算相图方法将对该系统材料的组分设计起重大的促进作用．

关键词：氧化锆氧化物系统相图相图计算陶瓷