检索结果-南通市图书馆

Analysis of synthetic parameters for coating aluminum powders with phenyltriethoxysilane coupling agent and their effects on powder flow behavior

在线全文

学校读者我要写书评

暂无评论

Particuology 2024年第7期90卷 412-417页

作者： Lillian M.Mawby Bellamarie Ludwig Benjamin J.Lear Department of Chemistry The Pennsylvania State UniversityUniversity ParkPA16802USA Applied Research Laboratory The Pennsylvania State UniversityUniversity ParkPA16802USA

Though silanization of aluminum powder is currently used to improve its flow properties,for use as an alternative fuel source,there are a wide range of experimental parameters for the process and not all of them have been thoroughly *** this is complete,it is unknown if the process is optimized in terms of time,efficiency,and ***,we report on a study into the effects of changes in humidity,degree of agitation,reaction temperature,and curing time upon the deposition of phenyl triethoxysilane into 20μm(d50)aluminum *** confirm the deposition of the coating via diffuse reflectance infrared spectroscopy and x-ray photoelectron *** then characterize the coated particles using apparent density measurements and Carney flow *** analysis of variance,we find that,of the parameters explored,only changes in cure time and reaction temperature provide meaningful changes to the apparent density,while none of our parameters produced statistically significant changes in Carney flow ***,we conclude that,when optimizing silanization of aluminum particles,environmental control of humidity is unneeded and that the reaction can be run with minimal *** ability to largely ignore these parameters is a benefit to large-scale processing.

关键词： Aluminum powder Silane Fluidization apparent density Carney flow

Characterization of nanoparticle mixed 316L powder for additive manufacturing

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第12期47卷 162-168页

作者： Wengang Zhai Wei Zhou Sharon Mui Ling Nai Jun Wei School of Mechanical and Aerospace Engineering Nanyang Technological University50 Nanyang Avenue639798Singapore Singapore Institute of Manufacturing Technology 73 Nanyang Drive637662Singapore

Nanoparticles reinforced steels have many advantaged mechanical *** manufacturing offers a new method for fabricating nanoparticles reinforced high performance metal *** this work,we report the application of low energy ball milling in mixing nanoparticles and micron 316 L *** this method,0.3 and 1.0 wt% Y2 O3 nanoparticles can be uniformly distributed on the surface of 316 L powder with the parameters of ball-to-powder ratio at 1:1,speed at 90 rpm and 7 h of *** matrix 316 L powders remain spherical in shape after the mixing *** the meantime,the effect of low energy ball milling and the addition of Y2 O3 nanoparticles on the powder characteristics(flowability,apparent density and tap density) are also *** show that the process of low energy ball milling itself can slightly decrease the flowability and apparent density of the 316 L *** addition of 0.3 and 1.0 wt% Y2 O3 nanoparticles can also decrease the flowability,the tap density and the apparent density compared with the original 316 L *** of these changes result from the rough surface of the mixed powder produced by ball milling and the addition of Y2 O3 *** powder’s rough surface can increase the coefficient of friction of *** mixture of 316 L powder and Y2 O3 nanoparticles can be successfully used for selective laser melting(SLM).The relative density of SLM 316 L-Y2 O3 is measured at 99.5%.However,Y2 O3 agglomerations were observed which is due to the poor wettability between 316 L and Y2 O3.

关键词： Powder mixing Powder characterization Flowability apparent density Tap density Additive manufacturing

Preparation of precursor for stainless steel foam

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University of Technology 2008年第2期15卷 209-213页

作者：周向阳李善妮李劼刘业翔 School of Metallurgical Science and Engineering Central South Universit School of Biological Science and Technology Central South University

The effects of polyurethane sponge pretreatment and slurry compositions on the slurry loading in precursor were discussed,and the performances of stainless steel foams prepared from precursors with different slurry loadings and different particle sizes of the stainless steel powder were also *** experimental results show that the pretreatment of sponge with alkaline solution is effective to reduce the jam of cells in precursor and ensure the slurry to uniformly distribute in sponge,and it is also an effective method for increasing the slurry loading in precursor;the mass fraction of additive A and solid content in slurry greatly affect the slurry loading in precursor,when they are kept in 9%-13% and 52%-75%,respectively,the stainless steel foam may hold excellent 3D open-cell network structure and uniform muscles;the particle size of the stainless steel powder and the slurry loading in precursor have great effects on the bending strength,apparent density and open porosity of stainless steel foam;when the stainless steel powder with particle size of 44 μm and slurry loading of 0.5 g/cm3 in precursor are used,a stainless steel foam can be obtained,which has open porosity of 81.2%,bending strength of about 51.76 MPa and apparent density of about 1.0 g/cm3.

关键词： stainless steel foam precursor preparation open porosity bending strength apparent density

Dielectric properties and temperature increase characteristics of zinc oxide dust from fuming furnace

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2014年第12期24卷 4004-4011页

作者：张利波马爱元刘晨辉曲雯雯彭金辉罗永光左勇刚云南省特种冶金重点实验室昆明650093 微波能工程应用及装备技术国家地方联合工程实验室昆明650093 非常规冶金教育部重点实验室昆明650093 昆明理工大学冶金与能源工程学院昆明650093 云南驰宏锌锗股份有限公司曲靖655011

Cavity perturbation method was used to determine the dielectric properties （ε′,ε″, and tanδ） of zinc oxide dust in different apparent densities. The process was conducted to study the microwave-absorption properties of zinc oxide dust and the feasibility of microwave roasting zinc oxide dust to remove fluorine and chlorine. The dielectric constant, dielectric loss, and loss tangent were proportional to the apparent density of zinc oxide dust. The effects of sample mass and microwave power on the temperature increase characteristics under the microwave field were also studied. The results show that the apparent heating rate of the zinc oxide dust increases with the increase in microwave roasting power and decreases with the increase in the sample mass. The temperature of the samples reaches approximately 800 ＆#176;C after microwave treatment for 8 min, which indicates that the zinc oxide dust has strong microwave-absorption ability.

关键词： zinc oxide dust apparent density dielectric properties microwave heating temperature increase characteristics