一种钛合金及钛铝金属间化合物的高温防护技术

公开号　ＣＮ 1 2 4 92 80Ａ　　申请人　中国科学院金属腐蚀与防护研究所　　地址　 1 1 0 0 1 5辽宁省沈阳市东陵区文萃路 62号　　一种钛合金及钛铝金属间化合物的高温防护技术 ,其特征在于 :在钛合金或钛铝金属间化合物基材的表面涂覆搪瓷涂层 ,涂层化学成分为 (重量百分比 ) :基体剂ＳｉＯ2 4 0～ 80助熔剂Ｎａ2 Ｏ、Ｋ2 Ｏ、Ｂ2 Ｏ之一种或几种 5～ 2 0乳浊剂ＺｒＯ2 1～ 8辅助剂ＺｎＯ、Ａｌ2 Ｏ3、ＣａＯ、ＭｇＯ之一种或几种 1 0～30搪瓷涂层是将搪瓷粉放入无水乙醇中充分搅拌 ,然后喷涂于试样表面 ,在 80～ 1 0 0℃烘 1 0～ 2 0ｍ…     

耐水搪瓷涂层及其制备方法

本发明涉及搪瓷涂层,更具体地,涉及用于热水器的耐水搪瓷涂层。 搪瓷常遭受热水的腐蚀和溶解,这使其在诸如热水器等的应用中有困难。在热水器中,一旦保护金属基材的搪瓷涂层被一直溶解到基材,那么基材将很快发生腐蚀并被穿透,这时就必须更换热水器了。     

白炭黑对搪瓷涂层耐酸性能的影响研究

搪瓷釉料中添加不同粒度及不同质量的白炭黑,在BTC245R搪瓷钢表面烧制成搪瓷涂层,通过XRD及SEM分析研究了搪瓷涂层在硫酸溶液中的耐酸性能。研究表明,当粒度为1~2μm的白炭黑添加量不超过6%(质量分数)时,搪瓷料浆的分散性和流变性更好,增加了料浆涂搪时的悬浮和停留作用,利于降低搪瓷烧制时的晶化温度,促进β-SiO_2液态相迁移进入[AlO_4]网络中,形成稳定的NaAlSiO_4晶相,提高了搪瓷涂层的耐酸性能,使耐酸度降至11.84 mg/(cm~2·d),满足了工业搪瓷涂层的耐酸性能要求。     

搪瓷着瓷钢板和搪瓷釉料

本发明涉及一种搪瓷着瓷钢板,它特别是在搪瓷着瓷粘附特性方面是优异的,并且能够用作标牌、黑板、隧道和建筑用的内里材料和建筑用的外部材料,具体涉及一种在弯曲期间和弯曲之后在搪瓷粘附性方面优异的搪瓷着瓷钢板,它本身又可以在初步锻烧搪瓷涂层后用作建筑用的内里材料的面板料,然后加工和定形,并且具有优异的化学耐用性(耐化学     

搪瓷硬度的测定

本文详细叙述了搪瓷硬度及其涂层耐磨性能的测定方法。美国搪瓷研究所的用磨料及钢球在仪器中进行表面研磨的方法,能够按耐磨性能区分涂层。最接近实际的标准系测定其光泽的损失,而不是试样的重量损失。因为光泽的损失,使制品外形变坏。同时,还介绍了光泽损失数据与研磨时间及搪瓷硬度之间关系的方程式。     

Al2O3-瓷釉复合陶瓷涂层冲蚀磨损性能研究

利用搪瓷涂层的制备工艺在Q235A钢表面制备Al2O3-瓷釉复合陶瓷涂层,研究了瓷釉粒度、Al2O3陶瓷颗粒的粒度和体积分数对复合涂层耐冲蚀磨损性能的影响。结果表明:过渡层原料瓷釉粒度为16μm时获得涂搪性较好;硬质耐磨相的加入可显著提高复合涂层的耐冲蚀性能;本实验中在45°冲蚀角、15 MPa冲蚀气压、2.2 kg冲砂量的冲蚀实验条件下Al2O3粒度为50μm、体积分数为30%时涂层具有很好的耐冲蚀性,是无硬质相搪瓷层的4倍。     

二涂一烧工艺及其制品(日本专利 J87—2034)

专利申请范围 1.关于在一次烧成过程中,使二层搪瓷釉涂层附着的方法,是具有下述特点的工艺方法:使不含氧化铜的第一种搪瓷釉科涂覆在酸洗了的坯体上,形成干燥的粉末第一涂层,使熔化温度和稳定他温度高于第一种搪瓷釉料的第二种搪瓷釉料涂覆在该第一涂     

钛合金表面抗氧化玻璃-陶瓷涂层研究进展

抗氧化性差是影响钛合金在航空航天领域广泛应用的重要因素,提高抗氧化性成为钛合金研究的一个主要方向。玻璃-陶瓷涂层具有较宽的软化温度范围、良好的化学稳定性、高的机械强度,可作为钛合金高温抗氧化涂层。总结了钛合金表面抗氧化涂层材料的性能要求及玻璃-陶瓷抗氧化涂层材料的优缺点,综述了国内外钛合金表面抗氧化玻璃-陶瓷涂层的研究进展;展望了钛合金表面抗氧化玻璃-陶瓷涂层的发展方向。     

钛合金表面制备羟基磷灰石生物陶瓷涂层研究进展

钛合金表面制备羟基磷灰石生物陶瓷涂层以其优异的力学性能和生物活性,成为近年来材料学家研究的热点医用材料之一。本文综述了在钛合金表面制备羟基磷灰石生物陶瓷涂层的研究进展,特别是在提高涂层结合强度和涂层结晶度方面的最新研究成果,展望了钛合金表面制备羟基磷灰石生物涂层复合材料的发展趋势和前景。     

医用钛合金耐蚀性涂层的研究进展

介绍了医用钛合金的应用前景,分析了其腐蚀机理,并简述了新型医用钛合金及其表面耐蚀性涂层的研究进展.通过加入不同含量的Mo、Nb、Pa、Zr、Ta等元素生成的各种耐蚀性涂层可以改善钛合金的耐蚀性能.     

Preparation of Strongly Adherent Platinum Coating by Double Glow Plasma Technology

Abstract

Strongly adherent Pt coating was deposited on Ti alloy substrates using double glow plasma technology. The polycrystalline Pt coating exhibited a preferred (220) orientation. The coating strongly adhered to the substrate, and the adhesive forces between the coating and substrate were all greater than 60 N. The hardness and elastic modulus of the coating were about 1.2 and 180 GPa, respectively. Adherent Pt coating had a better corrosion resistance than the bare substrate in terms of polarization curves. The bright Pt coating was still well bonded to the substrate after corrosion testing. This work suggested that strongly adherent Pt coatings on Ti alloy substrates can be used in industrial production processes.     

电沉积Ni-P合金镀层耐蚀性的研究

研究了不同磷含量的Ni-P合金镀层在NaCl介质中的耐腐蚀性能。通过浸泡实验,得出不同磷含量的Ni-P合金镀层在w（NaCl）=5%和饱和NaCl溶液中的腐蚀数据,同时还与纯镍镀层、化学镀Ni-P合金镀层、1Cr18Ni9Ti不锈钢以及A3钢进行了比较。     

Synthesis and evaluation of TaC nanocrystalline coating with excellent wear resistance,corrosion resistance,and biocompatibility

To improve the mechanical properties, corrosion resistance, and biocompatibility of implanted titanium alloys, a TaC nanocrystalline coating was deposited on Ti–6Al–4V alloy using a double-cathode glow discharge method. The microstructure of the newly developed coating was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The coating exhibits a dense and uniform structure, composed of equiaxed TaC grains with an average grain size of 15.2 nm. The mechanical properties of the TaC-coated Ti–6Al–4V alloy were evaluated by a scratch tester, a nanoindentation tester, and a ball-on-disc tribometer. The average hardness of the TaC nanocrystalline coating is about 6 times higher than that of uncoated Ti–6Al–4V alloy and the specific wear rate of the coating is two orders of magnitude lower than that for Ti–6Al–4V at applied normal loads of 4.9 N under dry sliding condition. The electrochemical behavior of the TaC nanocrystalline coating after soaking in Ringer's solution for different periods was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Furthermore, in vitro cytocompatibility of the coating was assessed using MC3T3-E1 mouse osteoblastic cells. The results showed that the TaC coating exhibits better corrosion resistance and biocompatibility as compared to uncoated Ti–6Al–4V alloy.     

钛和铈对热浸锌镀层组织与耐蚀性能的影响

为了获得厚度适中、耐蚀性能好的热浸镀锌层,在锌浴中添加微量的Ti和Ce,分别在Zn-0.04%Ti、Zn-0.02%Ce和Zn-0.04%Ti-0.02%Ce镀浴中制得热浸锌合金镀层.采用金相显微分析以及电化学阻抗谱、电化学极化测试、中性盐雾试验,研究了Ti和Ce对镀层组织和耐蚀性能的影响.结果表明:在锌浴中添加0.0...     

Studies on plasma sprayed bi-layered ceramic coating on bio-medical Ti-13Nb-13Zr alloy

Biomedical Ti alloys are prone to undergo degradation due to the combined effect of wear and corrosion. To overcome these problems, surface modification techniques are being used. In this paper, the biomedical Ti alloy Ti-13Nb-13Zr was plasma sprayed with nanostructured Al₂O₃-13 wt%TiO₂, yttria stabilized zirconia powders and bilayer containing alternate layers of the two coatings to improve the corrosion resistance and microhardness of the substrate. The plasma sprayed coatings were characterized by X-ray diffraction, scanning electron microscopy and Raman spectroscopy. The microstructure, microhardness and surface roughness of the coatings were investigated. The corrosion resistance of the coatings was studied in simulated body conditions. The results show improved corrosion resistance for the bilayered coating compared to the individual plasma sprayed coatings on biomedical Ti-13Nb-13Zr alloy substrate.     

电沉积Ni-Mo-P合金及其析氢电催化性能的研究

在大量文献的基础上,采用正交试验优化电沉积Ni-Mo-P合金工艺.经过测试证明:Ni-Mo-P合金镀层致密,结合力强,具有较高的硬度和耐高温腐蚀的性能.通过极化曲线的测定,钛基Ni-Mo-P合金具有比钛电极和铁电极更低的析氢过电势,Ni-Mo-P合金具有较高的电催化性能,可望成为新一代氯碱工业用高活性阴极.     

In vitro cytotoxicity,corrosion and antibacterial efficiencies of Zn doped hydroxyapatite coated Ti based implant materials

Ti6Al4V alloy is successfully used as implant material in dental and orthopedic surgeries for years due to its much better compatibility, lower density, corrosion resistance, etc. compared to the other metals. Meantime, modification of the surface of these alloys is needed to enhance material-tissue interaction and osteointegration between the implant and the bone. In this study, Ti6Al4V alloy surfaces were modified by application of RF magnetron sputtering technique and coated with zinc (Zn) doped hydroxyapatite (HAp). The obtained coating was very stable with highly crystalline structure, demonstrated enhanced corrosion resistance, osteointegration and antimicrobial effectiveness against Escherichia coli (E. coli) bacteria.     

钢基体的Ni-P和Ni-Cu-P合金镀层的性能研究

对比了Ni-P合金镀层和Ni-Cu-P合金镀层的耐蚀性及硬度。研究了热处理温度及保温时间对两种镀层耐蚀性的影响。结果表明:与Ni-P合金镀层相比,Ni-Cu-P合金镀层表面更加致密,耐蚀性更好;当热处理温度为200~300℃时,Ni-P合金镀层和Ni-Cu-P合金镀层的硬度均随保温时间的延长而增大;当热处理温度为400℃时,Ni-P合金镀层和Ni-Cu-P合金镀层的硬度均随保温时间的延长先增大后减小。     

非晶Ni-P合金镀层的制备及应力腐蚀研究

为了探究非晶Ni-P合金镀层对304不锈钢应力腐蚀的影响,通过优化工艺配方制备非晶Ni-P合金镀层,并对其结构和耐蚀性进行了分析。结果表明:非晶Ni-P合金镀层表面平整,P的质量分数为10.72%;非晶Ni-P合金镀层的耐蚀性优于304不锈钢的,接近耐腐蚀材料等级;非晶Ni-P合金镀层的应力腐蚀敏感指数更低,起到较好的机械隔离和电化学保护作用。     

Zn-5%Al-RE镀层耐蚀性能的研究

试验了在高碳钢丝表面上热浸镀Zn-5%Al-RE合金层。通过湿热试验、晶间腐蚀试验、盐雾腐蚀试验，研究了该合金镀层的耐蚀性能，并与镀锌钢丝的耐蚀性能进行了对比。在水蒸汽的晶间腐蚀试验表明，合金镀层还略逊于锌镀层，但是在采用模拟海水的湿热试验以及盐雾腐蚀试验中，合金热浸镀层的耐蚀性能明显优于普通锌镀层，阳极极化曲线表明，合金层的致钝电流密度小，致钝电位较低，且稳定钝化区较宽，这可能是合金热浸镀层在海水中具有较好耐蚀性能的主要原因。