Materials Literature
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Resumo: Nanocompsitos de montmorilonita/polipirrol (MMT/PPy) foram preparados a partir da polimerizao in situ do pirrol na presena de argila, bentonita sdica natural, (MMT-Na + ) em soluo aquosa com ou sem surfactante aninico, dodecil sulfato de sdio (SDS), utilizando-se o cloreto de ferro (III) hexahidratado (FeCl 3…
Fracturing of a layered compound, zirconium phosphate, with ultrasound at various power inputs (ultrasound power) was investigated. A horn mounted on the transducer with the frequency of 20 kHz was used and the fracturing rate was estimated by measuring the time course change of light transmittance of the zirconium ph…
In this paper, an attempt was made (through theoretical analysis) to solve the problem of fatigue life and strength of an asphalt material modified with crumb rubber. The authors used the developed earlier idea of the possibility of micro-cracks propagation retardation and their arrest in heterogeneous systems (Kaplan…
Large Ag dendrites were rapidly deposited via a facile electrochemical route at a deposition current of 20 mA for 10 min in air at room temperature, employing a mixed system of AgNO3 and NH3·H2O as the electrolyte. The phase and morphology of the as-prepared product were characterized by means of powder X-ray diffract…
Ingeniería Investigación y Tecnología es una publicación trimestral, arbitrada, de investigación científica y tecnológica editada e impresa por la Facultad de Ingeniería de la UNAM. Su propósito es difundir información y conocimientos originales e inéditos relacionados con la ingeniería. Es un espacio para profesores,…
This study was aimed at studying the effect of preliminary treatment variations on the pangas catfish (Pangasius pangasius) skin gelatin, particularly the gel strength. The preliminary treatment using the whiting solution gave higher gelatin property (P<0.05) than that using alum (Al3(SO4)2) and Calcium Hydroxide (Ca(…
S.175-200
Shape-memory-alloy (SMA) has attracted considerable attention in recent years as a smart and efficient material due to their unique properties. SMA microactuators are recognized as one of the potential solutions for unresolved issues in the rapid development of micro electromechanical systems. This paper presents the…
The effects of vacuum annealing at different temperatures on the optical, electrical and photocatalytic properties of polycrystalline and amorphous thin films of the ternary semiconductor alloys Zn x Cd 1 - x S , Cu x Cd 1 - x S and Cu x Zn 1 - x S were investigated in stacks of binary semiconductors obtained by chemi…
In 2002, a review article was published in which molybdenum disulfide properties were discussed. The last sentence of the article read as follows: "Based on that described above, we can conclude that in spite of the vast applications of molybdenum disulfide in several industrial branches, many of the potential applica…
DSC tests were performed on several types of SMAs to verify the phase-transformation temperatures, and then experiments to examine their characteristics were carried out. An electric-current was supplied to the SMA wire to measure the appropriate operational current range. The force generated by the SMA wire increased…
Large quantities of biomass ash are generated everyday by the spice industries and are currently disposed off as landfill.However, this could transform into an environmental pollutant unless alternative techniques are developed for its disposal or value addition.Here in this study, the waste ash from biomass combustio…
We synthesize LiTa 1-x Fe x O 3-σ (LTFO) ceramics by the conventional solid-state reaction method. The samples remain single phase up to x = 0.09. The magnetic measurements show that the doping of Fe successfully realizes ferromagnetism of LTFO at room temperature. The dielectric measurements indicate that LTFO is fer…
Concrete pavement repair is frequently subject to stringent time constraints. Airport repairs do not allow for extended closures to traffic. Generally they cannot halt aircraft movements for days during taxiway or runway repairs. Airport pavement has a limited design life, after which it must be replaced. It must be r…
International audience
Three-dimensional integrated circuits (3D ICs) with advanced cooling systems are emerging as a viable solution for many-core platforms. These architectures generate a high and rapidly changing thermal flux. Their design requires accurate transient thermal models. Several models have been proposed, either with limited…
DIDACTIC APPLICATIONS -PART II.This work proposes the use of a graphite-Araldite ® 70% (graphite, m/m) composite electrode in didactic experiments, specifically in the quantitative determination of the neurotransmitter dopamine (DA) in a sample of pharmaceutical formulation.The goal is to demonstrate the possibility o…
有到 14wt% 的从 6wt% 的各种各样的瞬间内容的 Ti 瞬间合金被火花血浆 sintering 基于元素的粉末处理。微观结构和产生合金的机械性质上的 sintering 温度和瞬间内容的影响被调查。为每瞬间集中，最佳 sintering 温度是坚定的，导致合金的充分稠密、一致的微观结构。优化 sintering 温度逐渐地随瞬间内容的增加在 1100 鈥 ? 的范围增加 300 掳 C。Ti- 的微观结构(6 鈥 ? 2 ) 瞬间合金由尾阶段的 equiaxed 谷物包围的针状的伪阶段组成，当 Ti-14Mo 合金仅仅包含单个尾时，分阶段执行。好伪板条的小数量从尾猛抛阶段在合金的力量和坚硬贡献改进。在在 1250 掳 C…
The surface of ZrO 2 nanoparticles was modified by styrene coupling grafting method to improve the dispersion and interaction of the nanoparticles with the epoxy coating in which the modified ZrO 2 nanoparticles were used as an additive. The grafting performance and microstructure of the nanoZrO 2 /epoxy coating were…
在这研究，我们调查了 AlN 陶艺的绝缘的损失正切和介电常数怎么被象混合第二个传导性的阶段的方法， milling 时间， sintering 温度，和增加的粉末那样的因素影响。所有陶器的样品被火花血浆 sintering (SPS ) 在 30 MPa 的一个压力下面准备。有 30wt%40wt% 的 AlN 合成陶艺 sintered 原文如此在 1600 整獮汩 ? 瑳敲杮桴漠 ??? 琠???? 慐? 楷桴愠洠慥? 慶畬 ? 景ㄠ祝 ? 偍 ? 湡 ?? 慶楲湡散漠 ??‵偍 a