High Temperatures-high Pressures最新文献_第5页

A simple approach to estimate the melting temperature of alkali halides 估算碱卤化物熔化温度的一种简单方法

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI: 10.32908/hthp.v51.1213

M. Goyal

引用次数: 0

Influence of contact pressure on the thermal contact conductance of layered metallic sheets 接触压力对层状金属板热传导的影响

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI: 10.32908/hthp.v51.1107

T. Matsushita, I. Belov, A. Johansson, A. Jarfors

{"title":"Influence of contact pressure on the thermal contact conductance of layered metallic sheets","authors":"T. Matsushita, I. Belov, A. Johansson, A. Jarfors","doi":"10.32908/hthp.v51.1107","DOIUrl":"https://doi.org/10.32908/hthp.v51.1107","url":null,"abstract":"For the optimisation of the annealing process of aluminium coils, simulation of the process is often performed. To simulate the process with higher accuracy, reliable input parameters are required, and thermal conductivity (thermal contact conductance) is one of them. In the present study, a method to measure the thermal conductivity and thermal contact conductance of metallic sheets were developed based on the steady-state comparative longitudinal heat flow. The apparatus was built with a compression test machine, and thus it allows to control the pressure to the sample and carry out the measurements at different contact pressure. An equipped heater allows to heat the sample to 573 K. To evaluate the thermal conductance at the interface, a thermal resistance network model was applied. The measurements were carried out with an aluminium alloy (AA3003 sheets). In addition to the thermal contact conductance measurements, the surface roughness of the sheets was also investigated. The semi-empirical equation for the relationship between thermal contact conductance and contact pressure was obtained based on the measurement results.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Thermophysical properties of biodiesel fuels from modified perturbed hard trimer chain equation of state 由改性扰动硬三聚体链状态方程研究生物柴油燃料的热物理性质

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI: 10.32908/hthp.v51.1099

Negar Parvizi, F. Akbari, M. Alavianmehr, D. Mohammad-Aghaie

引用次数: 0

Molar heat capacity of liquid Ti, Al20Ti80 and Al50Ti50 measured in electromagnetic levitation 电磁悬浮法测量液体Ti、Al20Ti80和Al50Ti50的摩尔热容

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI: 10.32908/hthp.v51.1169

J. Brillo, J. Wessing, H. Kobatake, H. Fukuyama

引用次数: 3

Thermo-mechanical characterization of carbon-based ceramic foams for high temperature space application 高温空间应用碳基泡沫陶瓷的热力学特性

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI: 10.32908/hthp.v51.1003

M. Albano, A. Nenarokomov, R. Pastore, S. Budnik, A. Delfini, O. Alifanov, M. Marchetti, A. V. Morzhukhina, Dmitry M. Titov, F. Santoni, F. Piergentili, A. Netelev

{"title":"Thermo-mechanical characterization of carbon-based ceramic foams for high temperature space application","authors":"M. Albano, A. Nenarokomov, R. Pastore, S. Budnik, A. Delfini, O. Alifanov, M. Marchetti, A. V. Morzhukhina, Dmitry M. Titov, F. Santoni, F. Piergentili, A. Netelev","doi":"10.32908/hthp.v51.1003","DOIUrl":"https://doi.org/10.32908/hthp.v51.1003","url":null,"abstract":"The successful development of aerospace reusable launch vehicles (RLV) require to realize effective thermal protection systems (TPS) for preserving spacecraft integrity from the severe thermal loads during re-entry phase. To such an aim, due to the need of reducing payload transportation costs, applied research is driven towards lightweight materials with advanced thermo-mechanical properties. Space TPS are often based on sandwich structures, where the core material has the main function of thermal insulation. Ceramic porous materials, as carbon (C) and silicon carbide (SiC) foams, represent ideal candidates for application as structural TPS component, thanks to both low density and significant thermal stability at very high temperatures. The paper presents a joint experimental study of carbon-based ceramic foams proposed as sandwich’s core for TPS design. A full thermal characterization of commercial C- and SiC-foam materials is reported, including measurements of thermo-mechanical combined stress, temperature-induced outgassing behavior and heat transfer properties. These latter, in particular, are studied by means of a robust numerical technique, known as the inverse method, which allows to evaluate materials thermal conductivity and heat capacity over a wide range of temperatures, thus establishing the required material behavior for potential use in spacecraft TPS.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Modeling thermodynamic properties of Ni, Sn, Al and Cu nanosolids Ni, Sn, Al和Cu纳米固体的热力学性质建模

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI: 10.32908/hthp.v51.1263

Madan Singh, B. Taele, S. Lara, S. Singhal, Kamal Devlal

{"title":"Modeling thermodynamic properties of Ni, Sn, Al and Cu nanosolids","authors":"Madan Singh, B. Taele, S. Lara, S. Singhal, Kamal Devlal","doi":"10.32908/hthp.v51.1263","DOIUrl":"https://doi.org/10.32908/hthp.v51.1263","url":null,"abstract":"Surface atoms and dangling bonds on the surface affect the thermodynamic properties. A thermodynamical model, based on cohesive energy is presented to discuss the melting properties of materials at nanoscale. The model is used to realize the effect of size and shape on melting temperature Tmn, melting entropy Smn and enthalpy Hmn of Ni, Sn, Al and Cu metallic nanoparticles. The variation in Tmn, Smn and Hmn are examined for nanowire, film, spherical, regular tetrahedral, hexahedral and octahedral shaped nanoparticles. It is reported that Tmn, Smn and Hmn decrease with decreasing the size of the nanoparticles and smaller the particle size, greater are the size and shape effects and when size is less than 10 nm, it has been predicted that on decreasing size, Tmn, Smn and Hmn reduce appreciably. Also, at the same size, more the shape of nanoparticles departs from that of the sphere, smaller is the Smn and Hmn of nanoparticles and its changes are less for nanowire shape and more for regular tetrahedral shape. Our theoretical results are compared with the available experimental or simulation data. Results predicted by our model are in good agreement with experimental observations.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69443158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First-principle study of mechanical, optical and thermophysical properties of NiTiSn NiTiSn的力学、光学和热物理性质的第一性原理研究

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI: 10.32908/hthp.v51.1227

A. Gour, Suman Yadav, Rahul A. Rathore, Sadhna Singh

{"title":"First-principle study of mechanical, optical and thermophysical properties of NiTiSn","authors":"A. Gour, Suman Yadav, Rahul A. Rathore, Sadhna Singh","doi":"10.32908/hthp.v51.1227","DOIUrl":"https://doi.org/10.32908/hthp.v51.1227","url":null,"abstract":"In present work we have studied half-Heusler compound NiTiSn in perspective of optical, mechanical and thermophysical properties at high temperature and high pressure using density functional theory. We have calculated various dielectric properties viz absorption coefficients, optical conductivity, optical reflectivity and electron energy loss. We have also found high refractive index n(0) ≈ 5 of NiTiSn indicating highly denser medium for low energy waves. The calculated absorption coefficient and optical conductivity are in agreement with the experimental ones for optical device. The optical investigation of the compound shows high reflectivity in the UV region of the photon energy. The elastic properties are investigated in most stable structure of NiTiSn in order to ensure its mechanical applications. Our estimated values of Poisson ratio (n = 0.2735) and pughratio (B/G = 1.87) confirm the metallic nature of NiTiSn. Various thermophysical properties viz. Debye temperature, isothermal coefficients, heat capacity, entropy and volume have been studied at high temperature and high pressures which will upgrade its thermoelectric properties study. The thermophysical properties ensures the Debye T3 law and Dulong Petit limit of NiTiSn at high temperatures and high pressures.","PeriodicalId":12983,"journal":{"name":"High Temperatures-high Pressures","volume":"1 1","pages":""},"PeriodicalIF":1.1,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69442737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

OBITUARY: Ian Mellanby 讣告:Ian Mellanby

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI: 10.32908/hthp.v51.0929

Martin O�Neill

引用次数: 0

Modeling to determine the size dependence of Debye temperature in monometallic and bimetallic nanoalloys 建立模型以确定单金属和双金属纳米合金中德拜温度的尺寸依赖性

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI: 10.32908/hthp.v51.1123

M. Goyal, Madan Singh

引用次数: 0

Method for prediction of liquid-vapor critical points in binary mixtures: geometrical-EOS model 二元混合物中液-气临界点的预测方法:几何- eos模型

IF 1.1 4区工程技术

High Temperatures-high Pressures Pub Date : 2022-01-01 DOI: 10.32908/hthp.v51.1125

H. Grine, H. Madani

引用次数: 0