Erosive wear of in-situ transformed carbon fiber toughened alumina ceramic composites [PDF]
, 2016 An in-situ transformed carbon fiber toughened alumina ceramic matrix composite was prepared by vacuum hot pressure sintering technology, and the slurry erosion wear behaviour of the composite was tested at different impact angles and velocities on a ...
CHEN Hua-hui +4 more
core +1 more source
Investigation of behaviour of particle impact on material by impinging jet [PDF]
, 2017 颗粒冲击材料现象广泛存在于自然界以及工业领域中。应用实验测量与数值计算相结合的方法研究了颗粒射流冲击材料(304不锈钢)的磨损行为。考虑了颗粒粒; 径、运动轨迹、颗粒-壁面撞击点分布以及所导致材料物相结构变化。实验测试包括材料质量损耗、材料元素X射线衍射(XRD)分析、表面微观结构扫描电镜(; SEM)观察。对相应的颗粒射流冲击材料行为进行了数值计算,获得流场,颗粒场以及相应材料磨损。结果表明:颗粒射流冲击下颗粒运动轨迹与撞击点的分布不; 同,造成了材料样品表面磨损区域明显不同。颗粒 ...
周芳 +5 more
core +1 more source
Damage mechanism of reaction sintering SiC ceramic inner cylinders [PDF]
, 2016 A reaction bonded SiC ceramic used in a suspension preheater inner cylinder was comparatively analyzed before and after use by X-ray diffractometer,scanning tunneling microscopy and energy dispersive spectroscopy,and its damage mechanism was studied. The
CHEN Jun-hong +6 more
core +1 more source
Progress and trends in non-tool rock breaking theory and technology [PDF]
With the gradual implementation of China’s deep-earth engineering strategy, deep resource extraction and underground space construction have brought in some new opportunities, but they also face many challenges, with extreme geological conditions such as
Dayang YU +6 more
core +1 more source
Erosion corrosion behavior of AISI 304/316 stainless steel [PDF]
, 2016 304/316不锈钢以其良好的抗腐蚀性能和机械性能而得到广泛应用，尤其是在核电行业。然而，在其应用中存在着冲蚀磨损，腐蚀磨损，应力腐蚀开裂和高温氧化等问题。本文研究了304/316不锈钢两相射流冲蚀磨损行为，在NaCl、HCl和NaOH中的腐蚀磨损行为，在实验室模拟压水堆条件下的应力腐蚀开裂和高温氧化腐蚀行为。 （1）本文通过两相高速射流对304/316不锈钢的冲蚀实验，通过失重法和材料表面形貌、结构和成分微观分析，研究材料冲蚀磨损失效过程以及冲蚀机理分析 ...
周芳
core
Investigation of particle impact on 304SS under the liquid-solid two phase flow [PDF]
, 2017 随着社会工业、经济的发展，对能源的需求量日益增加，与此同时也造成了日益严重的环境污染问题。因此，能源结构的调整显得越发重要与急迫。核能具有环保、清洁、能量密度高的特点，弥补了新能源能量密度低的不足，避免了传统化石能源对环境的危害。自1954年世界上第一座核电站并网发电以来，核能得到了较大的发展，然而其安全性影响了核电持续、稳定、长远的发展。 在核电站正常运行时，颗粒状腐蚀物如铁屑、铜屑、细砂等，于二回路、三回路中与流动的流体形成液固两相流。液固两相流会对管道壁面进行磨损-腐蚀行为，导致材料的损耗 ...
曾子华
core
Practice and discussion on maintenance of seawater pump at LNG terminal [PDF]
Objective Seawater pumps serve as one of the core equipment at LNG terminals, and their normal operation is crucial to the safe and efficient production of these facilities.
Hongqiang LIU +2 more
core +1 more source
Shiyou jixie, 2012 利用自制的喷射型冲蚀磨损试验机，研究了水力压裂工况下高速携砂液对高压管汇材料42CrMo钢和45#钢的冲蚀磨损作用。研究结果表明，随着携砂液中砂粒质量浓度和粒径的增大，材料的冲蚀磨损量相应增多；材料的冲蚀磨损量随冲蚀速度的提高而显著增多，冲蚀速度与冲蚀磨损量呈一定指数关系，冲蚀粒子粒径和冲蚀速度对材料冲蚀磨损量的影响可概括为冲击粒子动能的影响；在粒子高速冲击时，42CrMo钢比45#钢具有更好的耐磨性，这是由材料本身的性能决定的。
张继信 +4 more
doaj
Influence of UV-irradiation on the Composition of Fatty Acids in the Vegetable Oil [PDF]
, 2017 采用酯化衍生-气相色谱/质谱法分析了5种市售植物油中的10种脂肪酸,脂肪酸总量在葵花籽油和玉米油中最高,在花生油和菜籽油中最低,橄榄油居中。组成分布特征以油酸和亚油酸占绝对优势（84.8%~94.7%）,但橄榄油中油酸和亚油酸的比值为1.0,显著高于其他油脂。500 W汞灯作光源,模拟光照24 h后,脂肪酸整体都呈现下降趋势,其中葵花籽油的下降幅度最大（50%）,而玉米油的下降幅度最小（30%）;随光照时间延长,油酸与亚油酸的比值呈逐渐升高的趋势,但反油酸与油酸的比值虽有所降低,但不同油脂之间差异较大 ...
吴水平, 张建辉, 朱恒
core
Current situation and intelligent development trend of high power liquid supply system of hydraulic support [PDF]
The liquid supply system of coal face in underground coal mine provides high pressure and large flow hydraulic power for hydraulic support, and its performance and reliability are the key to the safe, intelligent and efficient work of fully mechanized ...
Chao CAO +6 more
core +1 more source