填料改性UHMWPE基复合材料拉伸磨损性能的研究

研究了填料颗粒改性的超高分子量聚乙烯体系的拉伸与磨损性能，加入少理的粉煤灰可提高体系的拉伸强度，并且颗粒越细小，越有利于拉伸强度的提高。ＳｉＣ，Ａｌ２Ｏ３，特别是４０目石英砂可大幅度提高体系的耐磨料磨损能力。     

PE分子量对硬PVC／CPE／PE共混体系性能的影响

研究表明，ＰＥ分子量对硬ＰＶＣ／ＣＰＥ／ＰＥ共混体系的力学性能有重要影响。在实验配方范围内，以超高分子量聚乙烯（ＵＨＭＷＰＥ）对体系的增韧、增强改性效果为佳，但应注意ＵＨＭＷＰＥ的流动性与分散性，适当减少ＵＨＭＷＰＥ用量和以普通聚乙烯对其增塑改性均能达到良好效果。     

碳化硅晶须增韧氮化硅瓷的冲蚀磨损研究

本文比较了几类先进结构陶瓷材料受ＳｉＣ和石英砂粒子在不同冲击角下的冲蚀磨损行为．结果表明，在两种情况下（一是以ＳｉＣ为冲蚀粒子，在小于２０°的低冲击角下；二是分别以石英砂和ＳｉＣ为冲蚀粒子，在恶劣冲击条件下，如冲击角为９０°），ＳｉＣｗ／Ｓｉ３Ｎ４即碳化硅晶须增韧氮化硅，具有最佳抗磨损性能．冲击角为９０°时，在ＳｉＣ粒子冲蚀下，ＳｉＣｗ／Ｓｉ３Ｎ４冲蚀磨损率比常规Ｓｉ３Ｎ４下降了５０％；在ＳｉＯ２粒子冲蚀下，冲蚀磨损率下降了近７０％．其它冲蚀角下其冲蚀磨损率也有不同程度降低．基于ＳＥＭ分析，发现ＳｉＣｗ／Ｓｉ３Ｎ４表面主要磨损破坏为薄片状剥落，并伴随着一定程度的晶须拔出和晶须桥联现象．而Ｓｉ３Ｎ４表面则表现为整体演裂．说明ＳｉＣｗ／Ｓｉ３Ｎ４晶须的加入使其耐冲蚀磨损性能提高的原因在于：晶须拔出和晶须桥联有效地阻止了冲蚀磨损表面裂纹的扩展和联结．硬度是陶瓷材料重要的机械性能．硬度（Ｈｒ）和断裂韧性（Ｋｌｃ）的同时改善，有助于提高陶瓷材料的抗冲蚀磨损性能．     

DUAL－FREQUENCYANDMULTI－PARAMETERIPIN

ＤＵＡＬ－ＦＲＥＱＵＥＮＣＹＡＮＤＭＵＬＴＩ－ＰＡＲＡＭＥＴＥＲＩＰＩＮＳＴＲＵＭＥＮＴＡＮＤＩＴＳＡＰＰＬＩＣＡＴＩＯＮＲＥＳＥＡＲＣＨＢａｏＧｕａｎｇｓｈｕＨｅＪｉｓｈａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｌｏｇｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖ...     

STUDY ON COMPREHENSIVE UTILIZATION OF COBALTIFEROUS SLAG

ＳＴＵＤＹＯＮＣＯＭＰＲＥＨＥＮＳＩＶＥＵＴＩＬＩＺＡＴＩＯＮＯＦＣＯＢＡＬＴＩＦＥＲＯＵＳＳＬＡＧＧｕｏＢｉｎｇｋｕｎ；ＸｉａｏＬｉｘｉｎ（ＩｎｓｔｉｔｕｔｅｏｆＭｅｔａｌｌｕｒｇｉｃａｌＰｈｙｓｉｃｏｃｈｅｍｉｓｔｒｙａｎｄＭａｔｅｒｉａｌｓ，Ｃ...     

Melt Treatment of Al-7%Si Alloy by Flux Injection

ＭｅｌｔＴｒｅａｔｍｅｎｔｏｆＡｌ－７％ＳｉＡｌｌｏｙｂｙＦｌｕｘＩｎｊｅｃｔｉｏｎＬＩＰｅｉｙｏｎｇ；ＪＩＡＪｕｎ；ＧＵＯＪｉｎｇｊｉｅ；ＣＨＥＮＹｕｙｏｎｇ（李沛勇）（贾均）（郭景杰）（陈玉勇）（Ｄｅｐｔ．ｏｆＭａｔｅｒｉａｌＳｃｉｅｎｃｅａｎｄ...     

D-IMAGING OF VELOCITY FOR ACOUSTIC WAVES WITH MUL TI-SCALE OPERATOR

１Ｄ－ＩＭＡＧＩＮＧＯＦＶＥＬＯＣＩＴＹＦＯＲＡＣＯＵＳＴＩＣＷＡＶＥＳＷＩＴＨ　ＭＵＬＴＩ－ＳＣＡＬＥＯＰＥＲＡＴＯＲＳｏｎｇＳｈｏｕｇｅｎ（ＩｎｓｔｉｔｕｔｅｏｆＡｐｐｌｉｅｄＧｅｏｐｈｙｓｉｃｓ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆ...     

A Study on the Cutting Characteristic of SiCP/AI and SiCw/AI Composites

ＡＳｔｕｄｙｏｎｔｈｅＣｕｔｔｉｎｇＣｈａｒａｃｔｅｒｉｓｔｉｃｏｆＳｉＣＰ／ＡＩａｎｄＳｉＣｗ／ＡＩＣｏｍｐｏｓｉｔｅｓＨＡＮＲｏｎｇｄｉＯＵＨａｉｔａｏＹＡｏＨｏｎｇｑｕａｎ（韩荣第）（欧海涛）（姚洪权）（Ｄｅｐｔ．ｏｆＭｅｃｈａｎｉｃａｌＥｎｇ...     

Monostatic RCS Analysis of Complex Objects with Shaped Surface

ＭｏｎｏｓｔａｔｉｃＲＣＳＡｎａｌｙｓｉｓｏｆＣｏｍｐｌｅｘＯｂｊｅｃｔｓｗｉｔｈＳｈａｐｅｄＳｕｒｆａｃｅＧＵＯＷｅｎｙａｎ（郭文彦）ＬＩＮＳｈａｎｇｐｉｎｇ（林尚平）ＣＨＥＮＺｈａｏｙｕ（陈兆宇）（Ｄｅｐｔ．ｏｆＥｌｅｃｔｒｏｎｉｃａｎｄＣｏｍｍ...     

热致液晶聚合物与聚醚砜原位复合材料再加工性能的研究

本文研究了热致液晶聚合物ＴＬＣＰＫＵ９２３１和聚醚砜（ＰＥＳ）原位复合材料的再加工性能，在ＰＥＳ中加入２５ωｔ％的ＴＬＣＰＫＵ９２３１，拉伸强度大幅度提高，再次加工时拉伸强度虽略有下降，但仍远远高于ＰＥＳ的拉伸强度．随着循环加工次数增加，拉伸强度明显下降．     

Tribological behavior of MC Nylon6 composites filled with glass fiber and fly ash

To improve tribological property of MC Nylon6,the glass fiber and fly ash reinforced monomer casting nylon composites(GFFAPA)were prepared by anionic polymerization of ε-caprolactam.The friction and wear behaviors of composites under dry condition,water lubrication and oil lubrication were investigated through a ring-black wear tester.Worn surfaces were analyzed using a scanning electron microscope.The experimental results show that the tensile strength and hardness of nylon composites are obviously improved with reinforcement increasing.Compared to MC nylon,the lowest friction coefficient and wear rate of glass fiber reinforced nylon composites(GFPA)with GF30% respectively decrease by 33.1% and 65.3%,of fly ash reinforced nylon composites(FAPA)with FA20% decrease by 5.2% and 68.9% and of GFFAPA composites with GF30% and FA10% decrease by 57.8% and 89.9%.The main wear mechanisms of FAPA composites are adhesive and abrasive wear and of GFPA composites with high proportion are abrasive and fatigue wear.The worn surfaces of GFFAPA composites are much multiplex and the optional distributing glass fiber and fly ash have a synergetic effect on the wear resistance for GFFAPA composites.Compared with dry friction,the friction coefficient and wear rate under oil lubricated conditions decrease sharply while the latter reversely increase under water lubricated conditions.The wear mechanisms under water lubricated condition are principally chemical corrosion wear and abrasive wear and they become boundary friction under oil lubricated condition.     

一种适合硬膜抗磨粒磨损性能试验方法的研究

提出了一种适合评估硬膜材料抗磨粒磨损性能试验的新方法 ,并研究了各种因素对硬膜抗磨粒磨损试验结果的影响。试验发现 ,硬膜的磨损量与磨损时间以及试棒转速成正比 ;当磨料粒度在一定的范围内变化时 ,磨损量与磨料的粒度成正比 ;当磨料的粒度超过某一临界尺寸后 ,磨损速度变化不大。在粒度为 1 80目时 ,磨损试验的效果最佳。在有饱和水溶液的磨料中 ,同时存在着磨料磨损和气蚀磨损两种磨损方式。     

橡塑型洗衣机脚垫胶料的配方设计

以高性能的西门子洗衣机脚垫胶料为研究方向,采用橡塑并用改性法,在丁腈橡胶(NBR)中加入一定比例的高苯乙烯树脂(HSR),以改善胶料的工艺性能,提高胶料的强度、硬度及耐磨性;通过对NBR/HSR橡塑并用胶力学、耐介质、耐老化及压缩等性能的分析测试,结果表明,当NBR/HSR橡塑并用比为80/20时,其并用胶的综合性能最好,其拉伸强度、磨耗体积、压缩永久变形分别为21.31 MPa、0.18 cm3和25%,并用胶的各项性能均符合西门子洗衣机脚垫胶料的性能指标要求.     

连续碳纤维增强尼龙复合材料的研究

研究了碳纤维对CCF/MCPA力学性能的影响以及CCF/MCPA的摩擦学性能和磨损机制。结果表明 ,CCF/MCPA的弯曲强度、弯曲弹性模量、冲击强度和平面剪切强度随碳纤维含量的增加而提高 ;CCF/MCPA的摩擦系数和磨损量随着载荷的增加而降低。其磨损机制主要是磨粒磨损和粘着磨损的特征     

Microstructures and dry sliding wear properties of ZrB2/A356 composites synthesized by magneto-chemistry in situ reaction

In situ A356-x%PVF (particle volume fraction) ZrB₂ (x=1, 3, 5) composites were prepared via magneto-chemistry in situ reaction and the dry sliding wear properties of the composites were investigated. The experimental results show that ZrB₂ reinforcement particle is obtained and its morphology mainly present in spherical and regular hexagon. Wear test results show that the values of wear weight loss of the composites decrease with the increase of value under a given sliding time and a certain load of 60 N. Especially, when x=5, the weight loss of the as-prepared composite is 43.1 mg, which is only 36.4% to that of A356 alloy, 118 mg. The wear mechanism is changed from adhesion wear to adhesion wear and abrasive wear and then to abrasive wear with the increase of x value.     

Wear behavior of Cu matrix composites reinforced with mixture of carbon and carbon nanotubes

In order to improve wear resistance and decrease the cost, carbon and carbon nanotubes reinforced copper matrix composites were fabricated by the power metallurgy method. The effects of carbon (carbon and carbon nanotubes) volume fraction and applied load on the friction coefficient and wear rate under dry sliding of the composites were investigated at room temperature. By scanning electron microscopy (SEM), the worn surfaces and debris were observed, and wear mechanism was also analyzed and discussed. The experimental wear process consists of the run-in, steady wear and severe wear process with the increasing of sliding distance. Both the friction coefficient and wear rate of the composites first decrease and then increase with the increasing of carbon volume fraction. The minimum friction coefficient and wear rate are obtained when carbon is 4.0vol%. The wear mechanisms of the composites change from the adhesive wear and delamination wear to abrasive wear with the increasing of carbon volume fraction. Funded by the National Natural Science Foundation of China (50873047) and the Natural Science Foundation of Gansu Province (3ZS061-A25-039)     

沸石粒径及添加量对丁苯橡胶/顺丁橡胶性能的影响

采用行星球磨机对沸石进行研磨,用沸石替代部分炭黑填充到丁苯橡胶（SBR）和顺丁橡胶（BR）共混物中制备出复合材料,研究沸石的粒径及添加量对填充橡胶性能的影响.激光粒度测定仪和扫描电镜的观察结果表明：球磨后的沸石中位粒径可达2.4μm.当球磨沸石的添加量（质量份）为8份时橡胶的拉伸强度最高.沸石的添加能够有效降低复合材料的玻璃化转变温度,提高橡胶的断裂伸长率,但其硫化胶的磨耗体积和压缩疲劳温升也随之增加,添加球磨沸石的橡胶复合材料的湿抓着性比较好.     

废旧聚乙烯膜回收料的改性应用

通过对废旧聚乙烯膜(PE)回收料进行改性,制备了热塑性弹性体和木塑复合材料。实验表明,在回收PE/回收胶粉共混物中加入过氧化二异丙苯(DCP)能起到增容的效果。随DCP含量增加,共混物的拉伸强度持续增加,断裂伸长率开始时增加,DCP含量达到0.2份后,断裂伸长率减小。100%伸长时的永久变形量也随DCP含量增加而减小。DCP的加入提高了结晶开始温度和结晶温度,降低体系的结晶度,但对其熔融行为无明显影响。在回收PE/木粉复合物体系中加入PP-g-MAH后,可以起到增容的效果,且随PP-g-MAH用量增加,复合物的拉伸强度和冲击强度都持续增高。PP-g-MAH的加入对PE的结晶和熔化行为无明显影响。     

Microstructure and Tribological Behavior of Al_2O_3 Particle Reinforced Al Matrix Composites Fabricated by Spark Plasma Sintering

Nanoparticles and microparticles reinforced Al matrix composites were fabricated by spark plasma sintering, and the microstructure and tribological properties were investigated systemically. The nano-Al_2O_3 particle and micro-Al_2O_3 particle uniformly dispersed in Al matrix composites. The introduction of nanoparticles is beneficial to the decrease of friction coefficient and wear rate, while microparticles are responsible to the high friction coefficient, resulting in the abrasive wear. With the introduction of both nanoparticles and microparticles, their synergic effect will lead to the variation of tribological behavior.     

玄武岩短纤维增强环氧树脂复合材料的研究

以环氧树脂为基体、玄武岩短纤维为增强材料,制备了玄武岩短纤维/环氧树脂复合材料.研究了不同玄武岩短纤维含量对复合材料拉伸强度和耐磨性能的影响,采用扫描电子显微镜（SEM）观察了复合材料的断面形貌和磨损表面形貌,分析了磨损机制.结果表明,玄武岩短纤维/环氧树脂复合材料的抗拉强度和耐磨性能与纯环氧树脂相比均有不同程度的改善和提高,当玄武岩短纤维的含量为8%时,复合材料的拉伸强度最大;当玄武岩短纤维的含量为6%时,磨损率最低.随着玄武岩短纤维含量的增加,复合材料的磨损机制由黏着磨损向磨粒磨损转化.