Materials Literature
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One of the welding problems for magnesium alloy is the softening of the welded joints.Deep cryogenic treatment is put forward to strengthen joints of AZ31 magnesium alloy welded by TIG.The welding experiment and deep cryogenic treatment test for 8h at-160 ℃ are carried out.The tensile strength of the joints treated by…
CuInS2quantum dots core- shell structure was synthesized in the organic phase reaction system and the prepared core and core- shell were characterized. XRD results showed that CIS quantum dots of high purity and good crystal form were successfully synthesized. Variations in morphology and size of the quantum dots can…
This paper reviews the use of Nigeria Local palm oil for the production of polyol for the production of polyurethane foam in Nigeria. In the sub Saharan Africa and in Nigeria in particular, the market for polyurethane products such as rigid and flexible foam is so extensive owing to their vast applications. Currently,…
由香港中文大学历史系与广东省博物馆联合主办 (Co-organized by Chinese University of Hong Kong and Guangdong Province Museum)
Master's dissertation submitted in order to obtain the academic degree of Master of Science in Engineering Physics
The fur of farmed mink(mustela vision)is the main raw material for fur garment,so the heat retention property of fur are usually key parameters for evaluating fur heat insulation.To deminish the inadequacies of qualitative description of thermal insultation properties of the fur due to lack of quantative index,the pap…
As fases zeoliticas NaP1 e Analcima, foram obtidas com sucesso atraves da reacao de sintese hidrotermica. As cinzas (C) e zeolitas obtidas (CZ) foram caracterizadas pelas tecnicas de difracao de raios x (DRX), espectroscopia de infravermelho (FTIR), fluorescencia de raios X (FRX), microscopia eletronica de varredura (…
References p. 18-31, p. 59-62, p. 77-78, p. 91-92, p. 101, p. 116-117, p. 136-138, p. 152-154, p. 173-175, p. 202-206
The initial strength hype over carbon nanotubes arose from predictions of the strength of individual graphene layers, encouraged by measurements of individual MWCNTs and SWCNT bundles in AFM [1, 2]. However, while the scientists were professionally explicit as to what they had measured, the publicity assumed that thes…
The present work is focused on the Deep Drawing process in warm conditions and in particular on the evaluation of optimal working conditions and/or enhancement of the process limits using metamodels. Experimental tests were carried out with the aim of investigating the effect of the most important process parameters a…
Iden a gepberuhazasok alakulasara jelentős hatassal van a 2013. evben meghirdetett kerteszeti palyazat es az allatartas technologiai fejlesztesere kiirt palyazatok megvalositasa. Az uj mezőgazdasagi gepek vasarlasara forditott oszszeg 2014. I. negyedeveben 26 szazalekkal nőtt a bazisidőszakhoz kepest – 21,8 milliard f…
Spider silk produced by Nephila clavipes has been shown to have surprisingly marketable properties. The silk has been experimentally proven to have twice the extensibility of nylon and a higher toughness than Kevlar. One form of spider silk that has remained relatively unstudied is Piriform silk, which originates from…
Горный массив Гарц расположен в северной части территории Германии и занимает\nгеологическую позицию между Рейнскими складчатыми горами и глыбой Флейтинг-Росслау.\nПороды Гарца составляют геологически жесткий горстовый сильно метаморфизованный\nверхнепалеозойский комплекс, в котором преимущественно развиты девонские и…
Li₆UO₆ has a reversible phase transformation at 680°C and decomposes above about 850°C. At high pressure the low temperature modification becomes unstable because of an invariant point in the system Li₂O—Li₄UO₅ at approximately 13 Kb and 620°C. β-Li₆UO₆ has a triclinic unit cell with a = 5.203, b= 5.520, c = 5.536 A,…
采用溶胶-凝胶法（sol-gel）制备了Gd^3＋掺杂钛酸钡纳米粉体，借助XRD、SEM及矢量网络分析仪等分析测试手段对试样晶相、颗粒粒径、表面形貌及吸波特性进行了研究。结果表明：煅烧温度为1150℃可获得Gd^3＋掺杂钛酸钡，是顺电相与铁电相的混合相，Gd^3＋掺杂钛酸钡可产生间隙杂质能级及电偶极子畴壁共振和弛豫共振的改变，影响吸收特性；网状结构的PPy微观具有更大的离域空间，利于形成导电链和局部导电网络，提高导电率，促进电磁波损耗；Gd^3＋掺杂BaTO3/PPy复合材料，在5．25GHz左右有最大回损-32dB，小于-5dB的频宽达到1．70GHz。
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This thesis evaluates the behaviour of polypropylene (PP) and glass fibre reinforced polypropylene with a glass fibre content of10% and 30% by weight. Reinforcement materials are added to plastics to improve their mechanical properties and to reduce cost when compared to materials of similar strength. The difference i…
A compression behavior of polymer foam was analyzed by using horaogemzation FEM code. A unit cell for the homogenization method was applied to a part of the microstructure. The polymer matrix of the unit cell was modeled hyperelasticity to consider non-linear characteristics. An original simulation model of the polyme…
We study the possibility of application of electrochemical approaches to the analysis of the engineering state of structural metal materials in the stages of design and long-term operation in hydrogenating corrosive media. It is shown that the analysis of the effect of stresses on the intensity of corrosion processes…
Tässä raportissa on esitetty yhteenveto termisesti ruiskutettujen alumiinioksidipohjaisten pinnoitejauheiden ja niistä eri termisillä ruiskutusmenetelmillä valmistettujen pinnoitteiden ominaisuuksista. Työ liittyy osana TTY:n Materiaaliopin laitoksella toteutettuun Tekes ‐rahoitteiseen High‐ALPHA ‐projektiin, jossa al…