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橡胶材料在减震器中的应用 被引量:18
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作者 姜其斌 贾德民 +1 位作者 杨军 唐先贺 《橡胶工业》 CAS 北大核心 2004年第2期114-119,共6页
论述橡胶材料在减震器中的作用、材料的选择原理和性能测试方法以及橡胶减震器的发展趋势。橡胶材料独特的粘弹性能使其具有很好的减震和缓冲作用 ,NR ,CR ,BR ,SBR和EPDM等都在橡胶减震器中得到广泛应用 ;橡胶减震器的性能测试包括成... 论述橡胶材料在减震器中的作用、材料的选择原理和性能测试方法以及橡胶减震器的发展趋势。橡胶材料独特的粘弹性能使其具有很好的减震和缓冲作用 ,NR ,CR ,BR ,SBR和EPDM等都在橡胶减震器中得到广泛应用 ;橡胶减震器的性能测试包括成品检验、蠕变和应力松弛试验、耐疲劳性能和屈挠性能试验等 ;复合橡胶减震器、弹性胶泥缓冲器、磁流体复合弹簧等都是减震器的新型产品。 展开更多
关键词 橡胶材料 减震 胶料特性
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橡胶材料在减震应用方面的现状及展望
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作者 郑文博 吴文彪 《橡胶科技》 2004年第13期9-11,共3页
论述橡胶材料在减震器中的作用、材料的选择原理以及橡胶减震器的发展趋势。橡胶材料独特的粘弹性能使其具有很好的减震和缓冲作用,NR、CR、BR、SBR和EPDM等都在橡胶减震器中得到广泛应用;复合橡胶减震器、弹性胶泥缓冲器、磁流体复合... 论述橡胶材料在减震器中的作用、材料的选择原理以及橡胶减震器的发展趋势。橡胶材料独特的粘弹性能使其具有很好的减震和缓冲作用,NR、CR、BR、SBR和EPDM等都在橡胶减震器中得到广泛应用;复合橡胶减震器、弹性胶泥缓冲器、磁流体复合弹簧等都是减震器的新型产品。 展开更多
关键词 橡胶材料 减震 胶料特性
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橡胶减振器应用现状及发展探讨 被引量:5
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作者 唐维 《现代工业经济和信息化》 2019年第3期84-85,共2页
噪音给人们的生活带来了严重的影响,很多工业企业会使用橡胶减振器来降低机械振动,保护机械设备的同时提升产品的舒适性以及降低噪音污染。阐述了橡胶减振器的发展过程,分析了国内外橡胶减振器的现状、分类及应用,以期提高橡胶减振器在... 噪音给人们的生活带来了严重的影响,很多工业企业会使用橡胶减振器来降低机械振动,保护机械设备的同时提升产品的舒适性以及降低噪音污染。阐述了橡胶减振器的发展过程,分析了国内外橡胶减振器的现状、分类及应用,以期提高橡胶减振器在国内企业的利用率,从而降低工业噪音对环境的影响。 展开更多
关键词 橡胶材料 减振 胶料特性
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不同填料类型和用量对NR/SBR纳米复合材料物理和力学性能的影响
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作者 赵冬梅 MARYAM RAIATI +1 位作者 MOHAMMADRE ZA KALAEE SAEEDEH MAZINANI 《现代橡胶技术》 2018年第5期17-27,共11页
本文围绕炭黑填充SBR/NR(30/70)并用胶体系,添加不同类型和用量的纳米填料,分别制备纳米复合材料,研究了纳米填料对复合材料混炼胶的硫化性能和硫化特性以及硫化胶的力学性能和动态热力学性能的影响。本研究选用两种纳米填料作为补强剂... 本文围绕炭黑填充SBR/NR(30/70)并用胶体系,添加不同类型和用量的纳米填料,分别制备纳米复合材料,研究了纳米填料对复合材料混炼胶的硫化性能和硫化特性以及硫化胶的力学性能和动态热力学性能的影响。本研究选用两种纳米填料作为补强剂,两种填料分别是埃洛石纳米管(HNT)和碳酸钙(Ca CO3)纳米颗粒,在试验配方中的添加量是变量,在0~5质量份之间。研究结果表明,两种纳米填料对SBR/NR纳米复合材料硫化特性的影响方式完全相反:与未填充纳米颗粒的混炼胶相比,添加HNT的混炼胶随着HNT纳米材料用量增加,焦烧时间缩短,有效扭矩增大;添加Ca CO3的混炼胶,随着Ca CO3用量增加,焦烧时间延长,而有效扭矩则出现小幅下降。力学性能的测试结果显示,HNT补强的纳米复合材料随着HNT纳米填料用量增加,硫化胶的弹性模量和拉伸强度逐渐提高,纳米复合材料硫化胶的伸长率比未添加HNT的并用胶大幅度提升;添加CaCO3的纳米复合材料硫化胶的弹性模量和拉伸强度略有下降,而断裂应变明显增大。动态热力学性能分析结果表明,添加HNT的纳米复合材料,其阻尼峰对应的温度随着HNT用量增加,单方向地向高温方向移动;添加Ca CO3的纳米复合材料的阻尼峰对应的温度先是伴随着Ca CO3的少量加入而向高温方向移动,随着CaCO3的用量进一步增加后,阻尼峰对应的温度反而下降。与未添加补强剂的硫化胶相比,添加Ca CO3纳米颗粒后,阻尼峰的密集度明显提高,表明Ca CO3纳米复合材料体系阻尼能力更高。 展开更多
关键词 SBR/NR并用胶 纳米填料 胶料特性 硫化胶特性
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Paste-like cemented backfilling technology and rheological characteristics analysis based on jigging sands 被引量:1
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作者 魏冲 王新民 +1 位作者 张云海 张钦礼 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第1期155-167,共13页
To make backfilling body meet strength requirement,physical-chemical evaluation and proportioning tests were conducted on several backfilling materials.Jigging sands,#32.5 cement and fly ash were determined as backfil... To make backfilling body meet strength requirement,physical-chemical evaluation and proportioning tests were conducted on several backfilling materials.Jigging sands,#32.5 cement and fly ash were determined as backfilling aggregate,binding material and modified material,respectively.An optimized proportion of backfilling materials with a solid mass fraction of 78%and cement:fly ash:jigging sands mass ratio of 1:2:14,was suggested to Jiangan Pyrite Mine,China.The slurry made by optimized proportion produced obvious shear thinning phenomena,and was confirmed as paste-like slurry.To analyze its rheological characteristics,L-type pipeline test and Haake VT550 rotational viscometer test were conducted.Bingham and Casson fluid models were applied to several paste-like slurry samples to simulate flow and stress states;Casson fluid model was proved to have better simulation effect on paste-like slurry with shear thinning phenomena;rheological parameters of backfilling slurry made by suggested proportion were measured.Initial yield stress,average apparent viscosity and limiting viscosity are 55.35 Pa,1.216 Pa-s and 0.48 Pa-s,respectively.Compared with Bingham fluid model,Casson fluid model has a better simulation effect on paste-like slurry with shear thinning phenomena,through calculating the residual standard deviations. 展开更多
关键词 paste-like slurry jigging sands shear thinning Casson fluid model backfilling system
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Comparison in characterization of composite and sol-gel coating on AZ31 magnesium alloy
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作者 王振林 曾荣昌 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第B07期665-669,共5页
An Al2O3 protective coating on magnesium alloy AZ31 was prepared by a repeated direct sol-gel process annealing at 300℃and a composite coating was also deposited using Al2O3 particles dispersed sol followed by phosph... An Al2O3 protective coating on magnesium alloy AZ31 was prepared by a repeated direct sol-gel process annealing at 300℃and a composite coating was also deposited using Al2O3 particles dispersed sol followed by phosphating treatment and annealing at 300℃.The morphologies,structures and critical adhesive loads as well as corrosion properties of the coatings were comparatively investigated by scanning electron microscopy(SEM),X-ray diffractometry(XRD),nanoscratch test and electrochemical measurement.The results show that the composite coating has a more uniform,crack-free layer and improved adhesion to the substrate as compared with that of the repeated direct sol-gel coating owing to its lower heat strain.The main phases in both coatings consist ofγ-Al2O3 andδ-Al2O3 derived from annealed alumina sol,and the composite coating has an anticorrosion performance which is superior to that of the repeated direct sol-gel coating. 展开更多
关键词 SOL-GEL composite coating magnesium alloy
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Nanoindentation characteristics of cement with different mineral admixtures 被引量:7
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作者 HE ZhiHai QIAN ChunXiang +2 位作者 ZHANG Yi ZHAO Fei HU YingBo 《Science China(Technological Sciences)》 SCIE EI CAS 2013年第5期1119-1123,共5页
In order to determine the effects of different mineral admixtures including fly ash (FA), blast furnace slag (BFS) and metakaolin (MK) on hydration product phases from the nanoscale structure perspective, nanoin... In order to determine the effects of different mineral admixtures including fly ash (FA), blast furnace slag (BFS) and metakaolin (MK) on hydration product phases from the nanoscale structure perspective, nanoindentation characteristics of the samples with similar 28-day strengths have been investigated. The results indicate that the volume fractions of porosity in po- rosity and hydration product phases of the samples with the same kind of mineral admixture are almost equal to each other, and are greater than that of the sample without mineral admixture. Mineral admixtures especially MK can decrease remarkably the volume fractions of CH in porosity and hydration product phases, and there exists a good linear relationship between the (AI+Si)/Ca molar ratio of cementitious materials chemical compositions and the volume fraction of HD C-S-H gel in C-S-H gel. Therefore, it is possible to predict the volume fraction change of HD C-S-H gel in C-S-H gel by simply calculating the (AI+Si)/Ca molar ratio of cementitious materials with similar 28-day strengths under the constant water-binder ratio. 展开更多
关键词 NANOINDENTATION mineral admixtures hydration product phases volume fractions C-S-H gel elastic moduli
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Significant broadband extinction abilities of bioaerosols 被引量:2
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作者 Yihua Hu Xinying Zhao +5 位作者 Youlin Gu Xi Chen Xinyu Wang Peng Wang Zhiming Zheng Xiao Dong 《Science China Materials》 SCIE EI CSCD 2019年第7期1033-1045,共13页
Bioaerosol, an important constituent of the atmosphere, can directly affect light radiation characteristics due to absorption and scattering effects. Current research lacks a reasonable explanation for the extinction ... Bioaerosol, an important constituent of the atmosphere, can directly affect light radiation characteristics due to absorption and scattering effects. Current research lacks a reasonable explanation for the extinction abilities of bioaerosols in a broadband. Herein, we measured the reflectance spectra of 12 com m on biomaterials and calculated their complex refractive indexes. The peaks of the imaginary part of the complex refractive indexes are located at wavelengths of approximately 0.7, 2.7, 6.1 and 9.5μm. Based on photographs of the floating structures of bioaerosols, we constructed a model for calculating the extinction abilities of bioaerosols in the wavelength range of 240 nm to 14 (im. Taking AN02 spores as an example, absorption was found to account for more than 90% of the total extinction. In addition, the theoretical calculations and experimental data of transmittance corresponding to the smoke box show that bioaerosol exhibits significant broadband extinction ability from UV to IR bands, which provides new directions for the development of broadband light attenuation materials. 展开更多
关键词 BIOAEROSOL complex refractive index UV to IR BROADBAND light attenuation
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