共查询到18条相似文献,搜索用时 203 毫秒
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偶联剂TPM对火焰喷涂尼龙1010/石墨涂层力学性能的影响 总被引:5,自引:4,他引:5
在火焰喷涂尼龙 10 10 /石墨复合涂层配方中采用了偶联剂 TPM处理石墨技术 ,并利用拉力试验机研究了偶联剂 TPM对复合涂层的宏观力学性能 (涂层自拉伸强度、涂层与基体的结合强度 )的影响 .结果表明 :TPM的加入 ,使复合涂层性能得到改善 ,复合涂层宏观力学性能得到提高 ,从而获得了自拉伸强度 >30 MPa,结合强度 >15MPa的复合涂层 . 相似文献
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研究了反应热喷涂Al2O3金属陶瓷涂层在涂布刮刀上的耐磨性能.结果表明,铝热反应热喷涂技术能够促进涂层结合强度的提高和涂层耐磨性的提高.涂层平均结合强度达8MPa,耐磨性较之传统钢制刮刀耐磨性提高了2倍. 相似文献
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火焰喷涂尼龙1010和纳米石墨复合涂层的力学性能研究 总被引:1,自引:0,他引:1
采用电子万能实验机对火焰喷涂尼龙1010和纳米石墨复合涂层的力学性能进行了研究.结果表明:当m(尼龙1010):m(纳米石墨)=100:1时,涂层综合性能较好,涂层与基体(45#钢)的结合强度为42.96 MPa,涂层自拉伸强度为42.76 MPa,通过扫描电镜观察,涂层表面致密. 相似文献
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利用电子拉力机探讨了纳米TiO2对火焰喷涂尼龙1010涂层力学性能的影响.结果表明,当复合涂层配比为m(尼龙1010):m(纳米TiO2)=100:0.5时,复合涂层综合性能较佳,涂层自拉伸强度为43.33 MPa,涂层与基体结合强度为40.23 MPa.纳米TiO2能够显著提高涂层力学性能. 相似文献
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偶联剂对火焰喷涂超高分子量聚乙烯/石墨涂层力学性能的影响 总被引:1,自引:0,他引:1
在火焰喷涂超高分子量聚乙烯(UHMWPE)/石墨(G)复合涂层配方中采用了偶联剂TPM处理石墨技术,并利用拉力实验机及红外光谱测定仪等研究了TPM对复合涂层的宏观力学性能(如涂层与基体的结合强度、涂层自拉伸强度)及微观结构的影响。结果表明:偶联剂TPM的加入,使复合涂层的力学性能得到了明显改善,当m(TPM):m(G)=2:100,m(UHMWPE):m(G)=100:20时,复合涂层综合性能较好,涂层与基体的结合强度为6.82MPa,涂层自拉伸强度为32.79MPa。 相似文献
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刮刀是涂布机的关键部件,传统的(无涂层)蓝钢刀片戓工具钢带制造的涂布刮刀由于其磨损快、寿命短,己经不能满足高速涂布机的生产要求,需要开发具有金属/陶瓷碳化钨(WC/Co) 涂层的高耐磨型涂布刮刀。业界曾采用等离子喷涂等方法在钢带上制备各种陶瓷材质的耐磨涂层以提高涂布刮刀的使用寿命。但现行的工艺方法获得的涂层存在着涂层不致密、孔隙率高、结合强度低等不足之处,本研究采用国产的HVAF超音速火焰喷涂系统成功研制具有WC10Co4Cr碳化钨耐磨涂层的涂布刮刀,各项质量指标均超过等离子喷涂等方法制备的陶瓷涂布刮刀,其平均使用寿命为陶瓷刮刀的2倍以上,涂层质量可以与国际同类产品相媲美。 相似文献
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涡轴16发动机上有种零件需要采用等离子喷涂技术制备镍铬铝钇抗高温氧化涂层。文章研究了等离子喷涂工艺参数对镍铬铝钇涂层性能的影响,喷涂了试验件。涂层最终通过特种工艺鉴定并应用于涡轴16发动机。 相似文献
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Plasticizer types and coating methods affect quality and shelf life of eggs coated with chitosan 总被引:1,自引:0,他引:1
ABSTRACT: Effects of different plasticizer types (glycerol, propylene glycol, and sorbitol) and coating methods (brushing, dipping, and spraying) on the internal quality and shelf life of chitosan-coated eggs were evaluated during 5 wk of storage at 25 °C. The Haugh unit and yolk index values suggested that chitosan coating, irrespective of the plasticizer types, extended the shelf life of eggs by almost 3 wk at 25 °C compared with noncoated eggs. After 5 wk of storage, plasticizer types did not significantly affect the quality (weight loss, Haugh unit, and yolk index) of chitosan-coated eggs. However, there was an observable trend indicating that use of sorbitol rather than propylene glycol and glycerol as a plasticizer was better in reducing weight loss (whole egg) of chitosan-coated eggs during a 5-wk storage. After a 5-wk storage, there were no significant differences in weight loss and weight of albumen and yolk among chitosan-coated eggs, regardless of the coating methods. However, both brushing and dipping methods yielded chitosan-coated eggs with better yolk (higher yolk index values) and albumen (lower pH) qualities than did the spraying method. During 3 to 5 wk of storage, the Haugh unit values of chitosan-coated eggs by the brushing method were higher than or comparable to those by dipping or spraying. Therefore, coating of eggs with chitosan using sorbitol as a plasticizer and by the brushing method may offer a protective barrier in preserving the internal quality and thus extending shelf life of eggs. 相似文献
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高雷 《皮革制作与环保科技》2022,3(2):105-107
在喷漆过程中,会产生挥发性有机气体,其含有大量的有毒有害成分,分析造成污染的主要原因是包含喷雾颗粒以及有机废气.这些有害物质对人们的身体健康产生了严重威胁,同时也对环境造成了非常严重的破坏.其中,喷涂有机废气主要是指在喷漆过程中产生的有机污染、喷雾颗粒以及喷雾涂料中能够溶解或输送的微粒.基于以上原因,本文探讨了喷漆有机... 相似文献
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Enhanced bonding strength of heat-treated wood using a cold atmospheric-pressure nitrogen plasma jet
Thi Hai Van Nguyen Tat Thang Nguyen Xiaodi Ji Van Dinh Nguyen Minghui Guo 《Holz als Roh- und Werkstoff》2018,76(6):1697-1705
In this work, the bonding strength enhancement of heat-treated wood using a cold atmospheric-pressure nitrogen plasma jet for several lengths of treatment time was investigated. The enhancement of bonding strength was assessed by measurement of the contact angle of aqueous adhesive and water borne finish along with determination of compressive shear strength of wood samples bonded with an aqueous adhesive and pull-off strength of a water borne finish coating on wood samples. Additionally, the elemental composition and crystallinity index of the heat-treated wood surface were characterized using X-ray photoelectron spectroscopy and X-ray diffraction. As expected, the measurements demonstrated that contact angle decreased after atmospheric-pressure nitrogen plasma jet treatment, and the optimal treatment time was 100 s. X-ray photoelectron spectroscopy shows that hydrophilic groups such as C=O, OH, and COOH appeared on the surface of the HW. The atmospheric-pressure nitrogen plasma jet treatment had a positive effect on the crystallinity of heat-treated wood because of a slight degradation of hemicelluloses. Increasing the bonding strength of heat-treated wood is beneficial for broadening the fields of its applications. 相似文献
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采用十二烷基苯磺酸钠表面活性剂对Accu-Lube LB-2000基础油进行改性处理来提高其电导率,获得了适用于静电喷雾润滑的润滑液。通过目标网状法检测改性润滑液的荷电性能,利用四球摩擦磨损试验分析润滑液流量、时间和载荷对静电喷雾润滑摩擦磨损性能的影响。结果表明,表面活性剂溶液体积含量为5%的润滑液具有较稳定的乳化状态,且电导率可达到6.5×10-5S/m,能满足静电喷雾润滑的荷电要求;与普通喷雾润滑相比,静电喷雾润滑在不同润滑液流量与载荷下均能获得更好的减摩抗磨性能,尤其是在润滑液流量为5 mL/h和载荷为147 N下作用效果更显著。 相似文献