防蚀的

The high temperature and normal temperature mechanical properties,the thermal properties and the ablative properties of the composite were investigated.

目前，国内使用的耐烧蚀防热材料主要有C/C复合材料、酚醛树脂基复合材料、陶瓷基复合材料等[1]。

Selection of materials and the procedure of installation in cathodic protection will strongly affect the future maintenance cost and the corrosive behavior.

材料的选择及施工程式的每一步骤都决定了是否会增加防蚀成本、管线是否仍在默默腐蚀的关键。

They are:1the realization of thermal-protection and seal at the same location,namely the seal performance in the high temperature environment during atmospherical re-entry;2the screen of TPS materials which have a synchronic-ablative characteristic between the glass and adjacent material of the window,to avoid the appearance of steps,and hence the over-heating caused by the disturbing of gas flow;3the analysis and calculation program for distribution of temperature in a complex structure consisting of a series of different materials including transparent materials;and 4the ground test program which can predict the performance of side-view window.

讨论了研制中国栽人飞船舷窗防热和密封结构的几个技术难题：1保证舷窗在返回的高温环境中防热与密封可靠；2保证窗玻璃材料与周围防热材料烧蚀同步，避免出现局部干扰热流；3进行多种异质材料，包括透明材料组成的复杂结构温度场的分析计算；4通过地面模拟试验准确地预测实际飞行条件下舷窗的防热与密封性能。

Thermal protective material should be provided with characteristics of low ablation recession rate, large ablation enthalpy, high thermal shock resistance and little fluctuation in mechanical properties. Carbonous composite is one of ideal materials to survive in such environment and satisfy these requirments.

由于工作环境的特殊性以及防热结构的重要性，防热材料内部的微观结构特征、超高温热物理性能和力学性能的演化规律以及超高温环境下的烧蚀行为，评价结构的可靠性，已成为防热复合材料制造和应用中所亟待解决的重要理论和工程问题。

On the basis of atmospheric corrosion analysis and on the premise of unaltered originappearance of metal antiquity, a novel systematic technology of rust stabilized conversion and corrosioninhibition for archeological iron was developed in this thesis. Model occulted corrosion cell was used to studythe formation of bronze powder rust, its characteristics of pit corrosion and effect factors. The filmingtreatment of azoles composite corrosion inhibitors was used to prevent silver tarnishing, and its anti-tarnishingmechanism was proposed by measurement of electrochemical techniques and Surface-enhanced Ramanscattering.

在不改变文物原状的前提下，本文基于对金属质文物大气腐蚀过程的分析，发展了一种新的铁器文物表面锈层稳定转化与缓蚀保护的系统处理方法，用&模拟闭塞电池&的方法研究青铜器文物&粉状锈&的形成、点蚀特征和影响因素，采用唑系复合缓蚀剂成膜处理技术防止银器文物变色，利用电化学方法、SERS等方法研究并提出了唑系复合缓蚀剂防银变色的作用机理。

In order to prevent heat flow from transferring to internal structural componants, thermal protective composites are used to absorb and consume plenty of heat by means of mass losing caused by complicated physical and chemical reactions of decomposing, melting, vaporizing, subliming and so on, and widely applied as thermal protective components of strategical and tactical missiles and other re-entry spacecrafts.

烧蚀防热复合材料在热流的作用下能发生分解、熔化、蒸发、升华等多种消耗热能的物理—化学变化，藉材料自身的质量消耗带走大量热能，阻止热流传入结构内部，在战略战术导弹和航天器的防热部件中得到广泛应用。

Of all the strains,only strains OBS-2 and 1. 936 of Bacillus subtil is showed significantly inhibiting activity on the above pathogens in dual cult...

在田间小区生防试验中，OBS—2菌株水剂浸根＋OBS—2甘蔗制剂处理38d的防效为59.7％，1.936菌株作同样处理的防效为38.8％，蚀脉尖镰孢水剂是根的防效为41.7％。

Results show that w/b is not the factor influencing chloride penetration of ACT concrete, as the ion penetration of ACT specimens is all higher than 2000 Coulombs and can even be poorer than 10000 Coulombs.

致密配比法设计之混凝土，随著水泥浆量V(下标 P少，而拌和水量愈低，添加适量的卜作岚材料及低水胶比的氯离子，电渗量均小於2000 C，甚至低於1000 C以下，呈现出优异的防蚀耐久性。

NC cloth winding machine is special equipment that wind SRM's nozzle and prats of bearing ablation , heat protection , missile cone , emitter and astro navigation aircraft parts with bakelite .

数控布带缠绕机是用碳/酚醛，高硅氧/酚醛预浸胶带缠绕固体火箭发动机喷管，耐烧蚀，防热材料零部件，导弹鼻锥，发射筒以及宇航飞行器防热零部件的专用设备。

Watch Sapphire Crystal mirror is not a natural Sapphire, which is made of fine alumina powder as raw material, a reasonable amount of high-temperature in Celsius to Confederate Sapphire Crystal, after numerous operations made watch only pure mirror with Sapphire Crystal, resists wear and corrosion-resistant.

手表上的蓝宝石水晶镜面并非天然的蓝宝石制成，而是由精细的氧化铝粉末为原料，在一定的摄氏高温的炉内结成蓝宝石晶体块，再经过无数工序才制成手表上纯净无比的蓝宝石水晶镜面，具有抗磨损与防蚀效果。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失