Superficies y Vacío最新文献_第2页

In memoriam. Orlando Zelaya-Angel’s contributions in Superficies y Vacío 为纪念。Orlando Zelaya-Angel在Superficies中的贡献:Vacío

Superficies y Vacío Pub Date : 2021-11-23 DOI: 10.47566/2021_syv34_2-211123

M. A. Santana-Aranda

引用次数: 0

Physico-chemical and mechanical thermo-rheological characterization of three varieties of triticale starches 三种小黑麦淀粉的物理化学和机械热流变特性

Superficies y Vacío Pub Date : 2020-09-28 DOI: 10.47566/2019_SYV32_1-010001

Z. Correa-Pacheco, P. A. González-Fuentes, C. L. Tramón-Pregnan, S. C. Solorzano-Ojeda, A. Zúñiga-Quintana, M. A. S. Gutiérrez, J. Jiménez-Pérez

{"title":"Physico-chemical and mechanical thermo-rheological characterization of three varieties of triticale starches","authors":"Z. Correa-Pacheco, P. A. González-Fuentes, C. L. Tramón-Pregnan, S. C. Solorzano-Ojeda, A. Zúñiga-Quintana, M. A. S. Gutiérrez, J. Jiménez-Pérez","doi":"10.47566/2019_SYV32_1-010001","DOIUrl":"https://doi.org/10.47566/2019_SYV32_1-010001","url":null,"abstract":"Nowadays, starch is an excellent biodegradable option instead of synthetic polymers, to avoid contamination. In this work, triticale starch from three varieties (Faraón, Peteroa and Aguacero) was isolated and the physico-chemical and thermo-rheological properties were evaluated. Also, mechanical properties of thermoplastic films using this starch were assessed. From the physico-chemical analysis it was found that the moisture, protein and lipids contents were slightly different among starches. Amylose value was similar. Thermo-rheological behavior measured by Mixolab® revealed that initial water uptake was higher for Faraón variety due to the grain morphology observed by Scanning Electron Microscopy (SEM). Values for gelatinization temperature obtained were 82.2 °C for Faraón starch, followed by Peteroa (72.0 °C) and finally Aguacero (65.6 °C). From the mechanical properties, Faraón thermoplastic starch (TPS) films showed the highest value of Young’s modulus (1.90 ± 1.09 MPa) for the composition 50/25/25 (starch/glycerol/water). The highest elongation at break (64.77 ± 14.14 %) was obtained for Peteroa composition 50/35/15 (starch/glycerol/water). Then, triticale mainly used to feed animals more than for human consumption, could be good alternative for preparing biodegradable films with potential applications in agriculture and food packaging.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124416869","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

Efecto del aporte térmico en la resistencia a la corrosión de un recubrimiento de acero inoxidable martensítico depositado por soldadura 热输入对焊接沉积马氏体不锈钢涂层耐腐蚀性能的影响

Superficies y Vacío Pub Date : 2019-12-10 DOI: 10.47566/2019_syv32_1-010006

Héctor Guillermo Carreón Garcidueñas, Ariosto Medina Flores, Engelbert Huape Padilla, Luis Béjar Gómez

{"title":"Efecto del aporte térmico en la resistencia a la corrosión de un recubrimiento de acero inoxidable martensítico depositado por soldadura","authors":"Héctor Guillermo Carreón Garcidueñas, Ariosto Medina Flores, Engelbert Huape Padilla, Luis Béjar Gómez","doi":"10.47566/2019_syv32_1-010006","DOIUrl":"https://doi.org/10.47566/2019_syv32_1-010006","url":null,"abstract":"En el proceso de colada continua, los rodillos se utilizan para la contención, soporte, conducción y transporte de la losa. Para extender substancialmente la vida útil de los rodillos, la superficie está cubierta con una capa resistente al desgaste llamada revestimiento duro el cual es aplicado por medio de soldadura de recargue, para mejorar las superficies que se encuentran sometidas a desgaste severo, oxidación o corrosión de los rodillos. El objetivo del presente trabajo es estudiar el efecto del aporte térmico por medio de técnicas electroquímicas de un acero inoxidable martensítico 414N aplicado como revestimiento duro en agua de mar sintética. El proceso de soldadura para la aplicación de los recargues fue por medio de soldadura de arco con electrodo tubular (FCAW) variando el voltaje del arco. Las técnicas electroquímicas fueron polarización potenciodinámica (PP) y espectroscopia de impedancia electroquímica (EIS). Los resultados indican que todos los recargues presentan una estructura martensítica de listón, donde 26 V presentó un 5.44% de ferrita, 28 V 5.33% y 30 V 5.0%, se puede observar que con un alto aporte térmico empleado se obtiene la menor cantidad de ferrita. De los resultados electroquímicos se puede observar, para 30 V se tiene el comportamiento más activo teniendo un Ecorr de -535 mV/ECS, siendo para 26 V y 28 V los valores más nobles (-380 mV/ECS y -425 mV/ECS) respectivamente. Para los 28 y 30 V se presentan potenciales de ruptura de la pasividad (313 mV/ECS y 132 mV/ECS) respectivamente.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132771294","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

Study of the behavior of short chains in print paper subjected to a natural aging 自然老化条件下印刷纸短链的性能研究

Superficies y Vacío Pub Date : 2018-12-15 DOI: 10.47566/2018_SYV31_1-040058

José Refugio Martínez Mendoza, A. Nieto-Villena, J. A. Cruz-Mendoza, G. Ortega-Zarzosa, A. L. Guerrero-Serrano

引用次数: 1

Deposition of SnO2 buffer layer onto commercial conducting glass to be used in thin films solar cells technology 在商用导电玻璃上沉积SnO2缓冲层，用于薄膜太阳能电池技术

Superficies y Vacío Pub Date : 2018-12-15 DOI: 10.47566/2018_SYV31_1-040063

S. Melo, O. Vigil, C. A. Hernandez-Gutierrez, F. A. Pulgarin-Agudelo, H. Mendoza-Leon, E. Rodríguez

引用次数: 2

Surface micromachining of a micro electromechanical inertial transducer based on commercially available Floating Gate Transistor technology 基于市售浮栅晶体管技术的微型机电惯性传感器的表面微加工

Superficies y Vacío Pub Date : 2018-09-15 DOI: 10.47566/2018_syv31_1-030048

G. Abarca-Jimenez, Gabriel Romero-Paredes Rubio, M. Reyes-Barranca, M. Aleman-Arce, J. Munguia-Cervantes, S. Mendoza-Acevedo

引用次数: 0

Thermoelectrical characterization and comparative analysis of three finite element models of a MEMS thermal sensor MEMS热传感器三种有限元模型的热电特性及对比分析

Superficies y Vacío Pub Date : 2018-06-14 DOI: 10.47566/2018_SYV31_1-020033

Maribel Gómez Franco, A. Ramírez Treviño, E. Figueras, Angel Sauceda Carvajal

{"title":"Thermoelectrical characterization and comparative analysis of three finite element models of a MEMS thermal sensor","authors":"Maribel Gómez Franco, A. Ramírez Treviño, E. Figueras, Angel Sauceda Carvajal","doi":"10.47566/2018_SYV31_1-020033","DOIUrl":"https://doi.org/10.47566/2018_SYV31_1-020033","url":null,"abstract":"This document presents the finite element modeling using ANSYS to obtain the thermal resistance of a MEMS thermal sensor. Additionally, the document describes a thermoelectrical characterization to find the sensor performance parameters. For modeling purposes, we divided the thermal sensor into four different thickness zones. We analyzed three different models, the first includes all materials layers, the second involves an equivalent thermal conductivity and an equivalent thickness for each zone, and the proposed model besides using an equivalent thermal conductivity by zone also considers the same thickness for all zones to reduce simulation time and to optimize thermal sensor design parameters. The first model evaluates three different boundary conditions, while the second and third models consider two different thermopile wide strips. The thermal resistance of the proposed model has a relative error of 11% in relation to the experimental value. The model, considering all layers and heat power applied to the surface as boundary conditions, has the lowest error (9%), while models considering the thermopile strips width have shown a higher error, 67%. As a result, the proposed model for heat transfer analysis simplifies complex geometries and reduces simulation time.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129096385","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: 1

An experimental facility to study film growth on liquid phase, condensation and melting in downward-facing substrates 一种研究薄膜在液相中生长、冷凝和熔融的实验装置

Superficies y Vacío Pub Date : 2018-06-14 DOI: 10.47566/2018_SYV31_1-020026

C. Sandoval-Ríos, M. Nieto-Pérez, Jorge A. Huerta, J. Pineda-Piñón, E. Rodriguez-Vazquez

{"title":"An experimental facility to study film growth on liquid phase, condensation and melting in downward-facing substrates","authors":"C. Sandoval-Ríos, M. Nieto-Pérez, Jorge A. Huerta, J. Pineda-Piñón, E. Rodriguez-Vazquez","doi":"10.47566/2018_SYV31_1-020026","DOIUrl":"https://doi.org/10.47566/2018_SYV31_1-020026","url":null,"abstract":"Film growth, condensation and melting of materials are very important physical processes, involved in the development of semiconductor related industry processes, alkali metals and their oxides, and recently in nuclear fusion projects. The growth of low melting point thin films via liquid phase epitaxy (LPE) has drawn attention especially for the manufacture of semiconductor compounds containing indium, gallium, tin, lithium and their alloys, all characterized by a low melting point. That allows the growth of films in the liquid phase and subsequent control on crystallization morphology by manipulating quenching conditions. LPE yields highly crystalline either thin (a few nm) or thick (100s of µm) films with high purity. If LPE is performed in downward-facing substrates, Rayleigh-Taylor instabilities appear, and this effect of gravity in the film growth has not been studied in depth. This paper presents the design, construction and preliminary testing of an experimental facility to study film growth from the liquid phase, and also condensation and melting processes. This facility consists of a thermal evaporator and a substrate holder where samples are placed facing down. The size of the sample holder and the ability to achieve controlled thermal gradients across it, would allow the study of temperature effect in grown films morphology, and also in condensation and melting phenomena such as dripping onset and critical angle for film/drop displacement. Besides, system allows to study condensation modes and surface roughness on the condensation dynamics of liquid films growing from the vapor phase.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126454258","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

Study of LIPSS formation on bismuth thin films deposited by Pulsed Laser Deposition 脉冲激光沉积铋薄膜上LIPSS形成的研究

Superficies y Vacío Pub Date : 2018-06-14 DOI: 10.47566/2018_syv31_1-020039

A. Reyes-Contreras, M. A. C. López, L. Romero‐Salazar, E. Camps

{"title":"Study of LIPSS formation on bismuth thin films deposited by Pulsed Laser Deposition","authors":"A. Reyes-Contreras, M. A. C. López, L. Romero‐Salazar, E. Camps","doi":"10.47566/2018_syv31_1-020039","DOIUrl":"https://doi.org/10.47566/2018_syv31_1-020039","url":null,"abstract":"In this work, we report the fabrication of bismuth thin films on glass substrates by Pulsed Laser Deposition. A focused beam of a Nd:YAG laser (9 ns, 10 Hz, 1064 and 532 nm) was utilized to carry out the ablation of a high purity Bi target. The per pulse laser fluence was varied between 0.95 and 1.35 J/cm2, depending on the laser wavelength used. The deposits were characterized by SEM and XRD to analyze the surface morphology of thin films and their crystalline structure, respectively. The SEM micrographs showed differences in roughness, which increased with the laser wavelength. The diffractograms revealed the formation of Bi thin films with a polycrystalline structure or with a preferential orientation, depending on the mean kinetic energy of the plasma ions. The as deposited bismuth thin films were irradiated with a non-focused laser beam at low energies below the ablation threshold. In the laser treated area, it could be observed the formation of periodic structures, known as LIPSS (laser induced periodic surface structures). Depending on the crystallographic structure of the irradiated film, the formed LIPSS showed different characteristics, such as width and shape.","PeriodicalId":423848,"journal":{"name":"Superficies y Vacío","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122602757","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: 1

Growth of CdO films from CdO2 films by chemical bath deposition: Influence of the concentration of cadmium precursor 化学浴沉积CdO2膜生长CdO膜:镉前驱体浓度的影响

Superficies y Vacío Pub Date : 2015-03-15 DOI: 10.47566/2015_syv28_1-010025

E. Campos González, Á. Guillén Cervantes, J. Santoyo Salazar, O. Zelaya Ángel, L. E. Ramírez Velázquez, J. Santos Cruz, S. A. Mayen Hernández, F. de Moure Flores, M. Olvera, G. C. Contreras Puente

引用次数: 0