Journal of High Temperature Society最新文献_第2页

Influence of the Interface on Properties of Thermoelectric Materials 界面对热电材料性能的影响

Journal of High Temperature Society Pub Date : 2011-01-20 DOI: 10.7791/JHTS.37.5

S. Katsuyama, Toshihiro Tanaka

引用次数: 0

Periodic Microstructures Formation on Plastic Plate by Aerosol Beam Irradiation 气溶胶束辐照在塑料板上形成的周期性微结构

Journal of High Temperature Society Pub Date : 2010-11-20 DOI: 10.7791/JHTS.36.300

M. Tsukamoto, N. Abe, J. Morimoto, J. Akedo

引用次数: 0

Improvement of Ceramic Coatings for Electrostatic Adsorption Force Using Vacuum Plasma Spraying 真空等离子喷涂改善陶瓷涂层的静电吸附力

Journal of High Temperature Society Pub Date : 2010-11-20 DOI: 10.7791/JHTS.36.288

J. Takeuchi, R. Yamasaki, K. Tani, Yasuo Takahashi

引用次数: 0

パルス通電圧接法(PCHP)による金属/金属間化合物積層材料の創製脉冲通电压切法(PCHP)金属/金属间化合物沉积材料的制备

Journal of High Temperature Society Pub Date : 2010-03-20 DOI: 10.7791/JHTS.36.73

潔水内, 正美杉岡, 基博田中

引用次数: 1

準結晶を含む急冷凝固Al-Cr-Si粉末のパルス通電焼結含有准结晶的急冷凝Al-Cr-Si粉末的脉冲通电烧结

Journal of High Temperature Society Pub Date : 2010-03-20 DOI: 10.7791/JHTS.36.85

公洋尾崎, 慶三小林

引用次数: 1

Effect of Stable Phase Formation from Unstable Phase on Densification Acceleration of Amorphous Powder Produced by Mechanical Alloying 不稳定相形成稳定相对机械合金化非晶粉末致密化加速的影响

Journal of High Temperature Society Pub Date : 2010-03-20 DOI: 10.7791/JHTS.36.90

K. Isonishi

{"title":"Effect of Stable Phase Formation from Unstable Phase on Densification Acceleration of Amorphous Powder Produced by Mechanical Alloying","authors":"K. Isonishi","doi":"10.7791/JHTS.36.90","DOIUrl":"https://doi.org/10.7791/JHTS.36.90","url":null,"abstract":"The effect of phase formation from unstable to stable phase on densification process of pressure sintering was studied using mechanically alloyed powders. Powder mixture of Ti and Si having a composition of Ti-37.5mol%Si was milled for 360ks and 3600ks. The 3600ks milled powder showed homogeneous microstructure and amorphous-like XRD profile, although the 360ks milled showed (Ti+Si) lamellar microstructure. Milled powders were vacuum hot pressed at a heating rate of 20K/min up to 1273K with applying constant pressure from 10 to 200MPa, then kept for 10.8ks. It was observed that the density of the compact suddenly increased at the temperature range between 870K and 900K for 3600ks milled powder and about 820K and 910K for 360ks milled powder. This temperature showed good agreement with the exothermic reaction of DTA run, which corresponded to the phase formation from amorphous to Ti 5 Si 3 and from elemental phases to Ti-silicides. It was assumed that the reasons of this extraordinary densification behavior were temperature increase, volume change, rearrangement and acceleration of plastic deformation during phase formation. From experimental results to examine these factors, with the exception of plastic deformation, other factors did not show any effect in increasing density. It is concluded that the phase formation from unstable (amorphous) to stable (Ti 5 Si 3 ) phase accelerates plastic deformation of MA powder, and therefore it leads to increase the density. After the formation of stable phase, densification was stopped for a while then restarted at 1050K (3600ks milled powder) and (360ks milled powder). These temperatures seem to be a softening temperature of MA powders.","PeriodicalId":113412,"journal":{"name":"Journal of High Temperature Society","volume":"815 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115184205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solidification Analysis of Mod. 9Cr-1Mo Steel mod9cr - 1mo钢的凝固分析

Journal of High Temperature Society Pub Date : 2010-03-20 DOI: 10.7791/JHTS.36.116

Y. Yamamoto, H. Muto, Y. Akimoto, Shoitsu Seo, S. Ikeno

{"title":"Solidification Analysis of Mod. 9Cr-1Mo Steel","authors":"Y. Yamamoto, H. Muto, Y. Akimoto, Shoitsu Seo, S. Ikeno","doi":"10.7791/JHTS.36.116","DOIUrl":"https://doi.org/10.7791/JHTS.36.116","url":null,"abstract":"Modified 9Cr-1Mo steel has been applied to the parts of boiler in thermal power plants due to its excellent properties at high temperatures. In recent years, this steel also has been applied to the parts of turbine in ultra super critical power plants. Our company has been manufactured forged products by using large ingots of Mod.9Cr-1Mo steel that exceeded 20t for ten years or more, and it has been recognized that internal defects were liable to occur in Mod.9Cr-1Mo steel ingot. Especially the generation of the casting defects becomes more serious problem with the size of ingot,therefore measures were taken to improve the quality of forgings about both of ingot making and forging procedure. As a result of investigation of the defects in large Mod.9Cr-1Mo steel ingots, we concluded that defects formed in forgings were caused by casting defects and eutectic Nb (C,N). And the defect was proved to be influenced considerably by solidification rate and the cooling rate by means of solidification analysis that was performed because complete sticking of defect surface was difficult and the improvement of the steel ingot was necessary. Afterwards, large ingots were produced based on the analysis and the effectiveness of the analysis was confirmed by UT and the investigation of the microstructure. As mentioned above, we were able to raise quality and the stability of the product by improving the quality of the steel ingots.","PeriodicalId":113412,"journal":{"name":"Journal of High Temperature Society","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114920243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

セラミックス、サーメットの焼結・粒成長とシミュレーション研究陶瓷、萨米特的烧结、颗粒生长与模拟研究

Journal of High Temperature Society Pub Date : 2010-03-20 DOI: 10.7791/JHTS.36.96

秀彰松原

引用次数: 0

Sn-3.5Ag系とSn-5Sb系鉛フリーはんだ合金の高温クリープ挙動 Sn-3.5Ag和Sn- 5sb无铅合金的高温蠕变行为

Journal of High Temperature Society Pub Date : 2010-01-20 DOI: 10.7791/JHTS.36.47

昇平日高, 裕彦渡邉, 正行吉葉

引用次数: 1

Formation of Ni-base Self-fusing Layers with Using Direct Diode Laser 利用直接二极管激光形成镍基自熔层

Journal of High Temperature Society Pub Date : 2009-11-20 DOI: 10.7791/JHTS.35.314

J. Morimoto, T. Ozaki, Toshifumi Kobayasi, T. Kusuhara, N. Abe, M. Tsukamoto

{"title":"Formation of Ni-base Self-fusing Layers with Using Direct Diode Laser","authors":"J. Morimoto, T. Ozaki, Toshifumi Kobayasi, T. Kusuhara, N. Abe, M. Tsukamoto","doi":"10.7791/JHTS.35.314","DOIUrl":"https://doi.org/10.7791/JHTS.35.314","url":null,"abstract":"Laser cladding is an economic process to produce protective layers against wear and corrosion on highly loaded components. Advantages of laser cladding are uses of high melting point materials, low heat influence and heat distortion to a substrate, and high adhesion strength of a cladding layer. Laser cladding is expected as a surface modification technology to apply against the materials which are required in severe environments. The Ni-base self-fluxing alloy thermal sprayed coatings are widely employed to improve the quality of components whose surface is submitted to wear and corrosion. The use of thermal spray coatings for the wear protection of bulk materials is used throughout industry for mechanical components such as engine parts, hydraulic turbines and bearing surfaces . For the past few years, the authors have been developing a laser cladding method employing a high energy density laser beam heat source . Utilizing this method, steel plate was coated with Fe-B alloy powder to produce a hard surfacing layer with high hardness and erosion resistance. To develop a more effective cladding process, laser cladding was investigated using a powder feeder and Ni base self-fluxing alloy powder. The deposition efficiency and the thermal efficiency in dependence on the processing speed are determined. With minimal overall heat input, functional layers with thickness of millimeters are obtained and the surface processed per time unit is increased. Powder feed rate and track offset have to be adjusted simultaneously in order to obtain a sufficient cladding quality. The laser cladding layers were examined by optical microscope, scanning electron microscope and electron probe micro analyzer. The properties of the cladding layer were examined using the Vickers hardness test and sand erosion test.","PeriodicalId":113412,"journal":{"name":"Journal of High Temperature Society","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134023078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0