{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"Pressureless sintering of titanium aluminum carbide (Ti(3)AlC(2)) is difficult due to its easy decomposability at high temperatures, thus decomposition must be avoided during sintering. In this work, pressureless sintering was performed in different embedded powders and Al(4)C(3) was found to be effective to inhibit Ti(3)AlC(2) from decomposition due to the offering of Al rich ambience. High-density Ti(3)AlC(2) was obtained by pressureless sintering in Al(4)C(3) powder bed without additives. The good sinterability is due to the special crystal structure of Ti(3)AlC(2) and the easy diffusion of Al atoms. The mechanical properties of pressureless sintered Ti(3)AlC(2) are comparable to those of the hot-pressed ones.","authors":[],"categoryName":"|","doi":"","fpage":"744","id":"ba38e15a-983d-4c13-a38c-12ae32a39953","issue":"6","journal":{"abbrevTitle":"IJOACT","id":"4445fecf-7ef7-4048-819e-f386e4c6e69d","issnPpub":"1546-542X","publisherId":"IJOACT","title":"International Journal of Applied Ceramic Technology"},"keywords":[{"id":"97dd91d2-0b51-4c01-a5d5-0390ca11ad38","keyword":"liquid reaction synthesis;mechanical-properties;thermoelectric;properties;elemental powders;crystal-structure;silicon-nitride;grain-growth;diffusion;ti3sic2;microstructure","originalKeyword":"liquid reaction synthesis;mechanical-properties;thermoelectric;properties;elemental powders;crystal-structure;silicon-nitride;grain-growth;diffusion;ti3sic2;microstructure"}],"language":"en","publisherId":"1546-542X_2010_6_2","title":"Pressureless Sintering and Properties of Ti(3)AlC(2)","volume":"7","year":"2010"},{"abstractinfo":"Y2SiO5 has potential applications as a high-temperature structural ceramic and environmental/thermal barrier coating. In this work, we synthesized single-phase Y2SiO5 powders utilizing a solid-liquid reaction method with LiYO2 as an additive. The reaction path of the Y2O3/SiO2/LiYO2 mixture with variation in temperatures and the role of the LiYO2 additive on preparation process were investigated in detail. The powders obtained by this method have good sinterability. Through a pressureless sintering process, almost fully dense Y2SiO5 bulk material was achieved with a very high density of 99.7% theoretical.","authors":[],"categoryName":"|","doi":"","fpage":"732","id":"2a95afdb-54af-41ec-adac-a463dc87bd5c","issue":"3","journal":{"abbrevTitle":"JOMR","id":"155c387a-c8cb-4083-85f3-6b58aeef4116","issnPpub":"0884-2914","publisherId":"JOMR","title":"Journal of Materials Research"},"keywords":[{"id":"c5a23583-5dfa-4d13-b64e-ffb21eafd2d6","keyword":"yttrium silicate;thermal-expansion;si3n4-sio2-y2o3;system","originalKeyword":"yttrium silicate;thermal-expansion;si3n4-sio2-y2o3;system"}],"language":"en","publisherId":"0884-2914_2008_3_1","title":"Effect of LiYO2 on the synthesis and pressureless sintering of Y2SiO5","volume":"23","year":"2008"},{"abstractinfo":"Fabrication of Gd2O2S:Pr scintillation ceramics by pressureless reaction sintering was investigated. The 2Gd2O 3˙(Gd,Pr)2(SO 4)3˙mH2O precursor was made by hydrothermal reaction using commercially available Gd2O3, Pr6O11 and H2SO4 as the starting materials. Then single phase Gd2O2SO4:Pr powder was obtained by calcining the precursor at 750°C for 2 h. The Gd2O2SO4:Pr powder compacts can be sintered to single phase Gd2O2S:Pr ceramics with a relative density of 99% and mean grain size of 30 μm at 1750°C for 2 h in flowing hydrogen atmosphere. Densification and microstructural development of the Gd2O2S:Pr ceramics were examined. Luminescence spectra of the Gd2O2S:Pr ceramic under 309 nm UV excitation and X-ray excitation show a green emission at 511 nm as the most prominent peak, which corresponds to the 3P0-3H4 transition of Pr3+ ions.","authors":[{"authorName":"Jingbao Lian","id":"fb8fdad5-3f63-4337-9fa9-c8a5a651923a","originalAuthorName":"Jingbao Lian"}],"categoryName":"|","doi":"","fpage":"254","id":"145e9bd3-8346-4579-9ca6-07aff3747ae0","issue":"2","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"7400e099-32aa-42d5-b644-7d47843dad01","keyword":"Scintillation ceramics","originalKeyword":"Scintillation ceramics"}],"language":"en","publisherId":"1005-0302_2009_2_23","title":"Preparation of Gd2O2S:Pr Scintillation Ceramics by Pressureless Reaction Sintering Method","volume":"25","year":"2009"},{"abstractinfo":"The effect of Y2O3 and the total oxide volume fraction (Y2O3+Al2O3) on density and mechanical properties of low temperature (1770~1940℃) pressureless sintered β-SiC ceramics were presented. The optimum temperature for pressureless sintering of β-SiC was found to be 1850℃ and the optimum content of Y2O3 in the oxides was found to be between 40 and 57 wt pct. The highest sintered density was achieved by adding oxides at 14 vol. pct. Both of the highest strength and fracture toughness were achieved at 14 vol. pct oxide addition and yttria concentrations between 40 and 57 wt pct in the oxides. Hardness, on the other hand, was found to be the highest for samples with 14 vol. pct oxide addition and 64 wt pct Y2O3 in oxides.","authors":[{"authorName":"Gang Wang","id":"0b7833a5-65e8-4ad7-9b88-a1101c30b06b","originalAuthorName":"Gang Wang"},{"authorName":" Vladimir D.Krstic","id":"bee6f0e0-bcf1-4613-95eb-80665499623f","originalAuthorName":" Vladimir D.Krstic"}],"categoryName":"|","doi":"","fpage":"193","id":"89f1acdc-72fb-4a9c-843b-4aee865c3571","issue":"3","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"215c24b4-95ea-4cf9-8c03-f23d6b7f54b9","keyword":"Y2O3","originalKeyword":"Y2O3"},{"id":"e72d624e-a64a-41ea-a43a-45cd8d77b19e","keyword":"null","originalKeyword":"null"},{"id":"b686fb32-bd25-427a-9584-ee183c180f97","keyword":"null","originalKeyword":"null"},{"id":"15393709-c92e-4aa0-9e3a-2d2b333643fa","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1005-0302_2003_3_20","title":"Effect of Y2O3 and Total Oxide Addition on Mechanical Properties of Pressureless Sintered β-SiC","volume":"19","year":"2003"},{"abstractinfo":"","authors":[{"authorName":"","id":"54534b6e-aebb-453a-9ae2-bda7b262c139","originalAuthorName":""},{"authorName":"","id":"ab0512bb-743d-4b05-be52-60b39808e5d9","originalAuthorName":""},{"authorName":"","id":"9483b3a5-1ea2-41bc-99fa-b061abaaa2f7","originalAuthorName":""},{"authorName":"","id":"83ce74d7-e33a-4179-9aa2-7294ccad4e14","originalAuthorName":""},{"authorName":"","id":"49801d0d-9e08-4b97-b89e-5793bee5e0cf","originalAuthorName":""},{"authorName":"","id":"a475c3b7-da06-43fe-a984-1d5704883ff3","originalAuthorName":""}],"doi":"","fpage":"254","id":"a8847f68-2139-4d99-985c-b3a064b98a79","issue":"2","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"0e6f30cd-6f69-4247-9894-038ee87b8178","keyword":"","originalKeyword":""}],"language":"zh","publisherId":"clkxjsxb-e200902024","title":"Preparation of Gd2O2S:Pr Scintillation Ceramics by Pressureless Reaction Sintering Method","volume":"25","year":"2009"},{"abstractinfo":"An innovative processing route, in situ reaction combined with pressureless infiltration, was adopted to fabricate magnesium matrix composites, where the reinforcement TiC formed in situ from elemental Ti and C powders and molten Mg spontaneously infiltrated the preform of Ti and C. The influences of primarily elemental particle sizes, synthesizing temperature, holding time etc on in situ reactive infiltration for Mg-Ti-C system were systematically investigated in order to explore the mechanism of this process. In fabricating TiC/Mg composites, Mg can not only spontaneously infiltrate the preform of reinforcement and thus densify the as fabricated composites as matrix metal, but also it can accelerate the in situ reaction process and lower the synthesizing temperature of Ti and C as well. In situ reaction of Ti and C and Mg infiltration processes are essentially overlapping and interacting during fabrication of TiC/Mg composites. The mechanism proposed in this paper can be used to explain the formation and morphologies of the reinforcement phase TiC.","authors":[],"categoryName":"|","doi":"","fpage":"40975","id":"9b95f9b5-fbd4-4c90-b798-f38f5ee82b66","issue":"1","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"29b51da7-94ac-4364-819d-5f5c4ad250a5","keyword":"magnesium matrix composite;in situ reactive infiltration;titanium;carbide;mechanism;metals","originalKeyword":"magnesium matrix composite;in situ reactive infiltration;titanium;carbide;mechanism;metals"}],"language":"en","publisherId":"1005-0302_2004_1_2","title":"Analysis of in situ reaction and pressureless infiltration process in fabricating TiC/Mg composites","volume":"20","year":"2004"},{"abstractinfo":"In this article, a novel pressureless solid-liquid reaction method is presented for preparation of yttrium disilicate (gamma-Y2Si2O7). Single-phase gamma-Y2Si2O7 powder was synthesized by calcination of SiO2 and Y2O3 powders with the addition of LiYO2 at 1400 degrees C for 4 h. The addition of LiYO2 significantly decreased the synthesis temperature, shortened the calcination time, and enhanced the stability of gamma-Y2Si2O7. The sintering of these powders in air and O-2 was studied by means of thermal mechanical analyzer. It is shown that the gamma-Y2Si2O7 sintered in oxygen had a faster densification rate and a higher density than that sintered in air. Furthermore, single-phase gamma-Y2Si2O7 with a density of 4.0 g/cm(3) (99% of the theoretical density) was obtained by pressureless sintering at 1400 degrees C for 2 h in oxygen. Microstructures of the sintered samples are studied by scanning electron microscope.","authors":[],"categoryName":"|","doi":"","fpage":"1443","id":"4313d953-9d32-4d84-9c0e-ce4ad31c023c","issue":"6","journal":{"abbrevTitle":"JOMR","id":"155c387a-c8cb-4083-85f3-6b58aeef4116","issnPpub":"0884-2914","publisherId":"JOMR","title":"Journal of Materials Research"},"keywords":[{"id":"9a5c3c68-f781-48f7-a61a-2f3c525a9dc7","keyword":"yttrium disilicate powder;pressed silicon-nitride;gel method;behavior;crystallization;microstructure;densification;stability;evolution;ceramics","originalKeyword":"yttrium disilicate powder;pressed silicon-nitride;gel method;behavior;crystallization;microstructure;densification;stability;evolution;ceramics"}],"language":"en","publisherId":"0884-2914_2006_6_2","title":"Low-temperature synthesis and sintering of gamma-Y2Si2O7","volume":"21","year":"2006"},{"abstractinfo":"In this study, a well-dispersed gamma-Y2Si2O7 ethanol-based suspension with 30 vol% solid loading was prepared by adding 1 dwb% polyethylene imine dispersant, which allows feeble magnetic gamma-Y2Si2O7 particles with anisotropic magnetic susceptibility to rotate in a 12 T strong magnetic field during slip casting, resulting in the development of a strong (20 (2) over bar) texture in green bodies. Pressureless sintering gives rise to more pronounced grain growth in the textured sample than in the untextured sample prepared without the magnetic field due to the rapid migration of the grain boundaries of the well-oriented grains, which was revealed by constant-heating-rate sintering kinetics. It was found that the use of two-step sintering is very efficient not only for inhibiting the grain growth but also for enhancing the (20 (2) over bar) texture. This implies that controlled grain growth is crucial for enhancing texture development in gamma-Y2Si2O7.","authors":[],"categoryName":"|","doi":"","fpage":"2521","id":"67e6ee0f-93bb-437c-abd5-5f2a1ac7ccb9","issue":"8","journal":{"abbrevTitle":"JOTACS","id":"0e2c67d6-98e8-477b-999d-ec8bc9a7c78a","issnPpub":"0002-7820","publisherId":"JOTACS","title":"Journal of the American Ceramic Society"},"keywords":[{"id":"0a5c1050-72a8-4e11-83f7-cbf6c57805fd","keyword":"constant grain-size;mechanical-properties;crystal morphology;silicon-nitride;oxide powders;ceramics;alumina;fabrication;deformation;stability","originalKeyword":"constant grain-size;mechanical-properties;crystal morphology;silicon-nitride;oxide powders;ceramics;alumina;fabrication;deformation;stability"}],"language":"en","publisherId":"0002-7820_2008_8_1","title":"Tailoring texture of gamma-Y2Si2O7 by strong magnetic field alignment and two-step sintering","volume":"91","year":"2008"},{"abstractinfo":"Many problems appear in the sintering process of vanadiumbearing titanomagnetite, such as high energy consumption and low productivity; sinter quality is also very poor for its low tumble strength and high reduction degradation. Sinter productivity and quality are dominated by bed permeability and mineralogy structure, which are highly influenced by the thermal state of sintering bed, so the sintering process of titanomagnetite is researched by bed dissection in this work. Temperature evolution curves of sinter materials were measured, and the results show that melting duration, peak temperature duration and sintering temperature of different layers differ greatly from each other; flame front speed and vertical sintering speed of bed lower region are much smaller than those of bed upper region. Simultaneously, sinter samples were collected from different layers, and their mineralogy characteristics are analyzed; sinters from bed lower region have poor mineralogy structure, and the amounts of perovskite and dicalcium silicate increase intensively, which are bad for sinter strength and reduction degradation property. Measures are proposed to improve the quality and productivity of titanomagnetite sinter.","authors":[{"authorName":"BAI Yongqiang","id":"2e86578f-89d0-4d56-9e53-78b92473fbb5","originalAuthorName":"BAI Yongqiang"},{"authorName":"CHENG Shusen","id":"afcaf2da-ef9b-4fa6-a772-e3e0cd6e68a6","originalAuthorName":"CHENG Shusen"},{"authorName":"BAI Yanming","id":"7a9561a6-da49-4257-8756-130f45eee0e1","originalAuthorName":"BAI Yanming"}],"categoryName":"|","doi":"","fpage":"8","id":"80331860-b577-4c0f-b323-5fea18836341","issue":"6","journal":{"abbrevTitle":"GTYJXBYWB","coverImgSrc":"journal/img/cover/GTYJXBEN.jpg","id":"1","issnPpub":"1006-706X","publisherId":"GTYJXBYWB","title":"钢铁研究学报(英文版)"},"keywords":[{"id":"d5b2a4bb-71cb-4026-bc89-78816784f991","keyword":"sintering ","originalKeyword":"sintering "},{"id":"fff44b99-2b76-4da8-87f9-44d4e75d359d","keyword":" vanadiumbearing titanomagnetite ","originalKeyword":" vanadiumbearing titanomagnetite "},{"id":"1fa456fc-ea6d-425f-8a6f-c5c4b7544e80","keyword":" thermal state ","originalKeyword":" thermal state "},{"id":"85fe33f0-1265-41b9-813d-37f0c97b06c2","keyword":" bed dissection ","originalKeyword":" bed dissection "},{"id":"1fb84bd9-d32b-493c-b917-afc9c6c21fce","keyword":" mineralogy characteristic","originalKeyword":" mineralogy characteristic"}],"language":"en","publisherId":"1006-706X_2011_6_5","title":"Analysis of VanadiumBearing Titanomagnetite Sintering Process by Dissection of Sintering Bed","volume":"18","year":"2011"},{"abstractinfo":"Hydrothermally synthesized nano-size CeO2 powders, chemically precipitated CeO2 powders and commercial micron-size CeO2 powders were investigated by DTA/TGA and TEM. The sintering behavior of these powders was studied by continuous monitoring of the shrinkage kinetics. The microstructural features of the sintered specimens were observed by SEM. The sinterability of the CeO2 powder compact increased with decrease in particle size. During the high temperature sintering process a redox reaction occurred, i.e. CeO2 was reduced to Ce2O3, and oxygen gas was released. The redox reaction influenced the sintering behavior of CeO2, resulting in a decrease in density and microcracking for the hydrothermally synthesized nano-size CeO2 powder compacts, and sagged points in the sintering curves for the chemically precipitated and commercial micron-size CeO2 powder compacts. It was found that the redox reaction of ceria produced additional pores during the sintering process and thus a much higher temperature was needed to achieve a high density. (C) 1997 Acta Metallurgica Inc.","authors":[],"categoryName":"|","doi":"","fpage":"3635","id":"086702d8-ae14-4313-98f3-fd0e76423d8a","issue":"9","journal":{"abbrevTitle":"AM","id":"473e1d60-024a-4fd2-8f59-9e3ede87721e","issnPpub":"1359-6454","publisherId":"AM","title":"Acta Materialia"},"keywords":[{"id":"1e3d86fb-707b-4f59-99da-7714fadc034d","keyword":"electrolyte;oxygen;ceo2","originalKeyword":"electrolyte;oxygen;ceo2"}],"language":"en","publisherId":"1359-6454_1997_9_1","title":"Effect of redox reaction on the sintering behavior of cerium oxide","volume":"45","year":"1997"}],"totalpage":52,"totalrecord":517}