游离碳

游离碳对化学气相沉积SiC纤维微结构的影响

Effects of free carbon on Microstructure of CVD SiC fiber

提高沉积温度和H2/C3H6的流量比，TaC涂层中游离碳的含量减少；

With the increase of temperature and H_2 / C_3H_6 ratio , the content of free carbon is decreased .

随CH4流量增加，游离碳含量增加。

With the increase of CH 4 flow , the content of floating carbons is increased .

这种纤维具有β－SiC微晶和自由碳相混合的微结构，其拉伸强度和电阻率随着纤维中游离碳含量的增加而降低。

It has the microstructure of β - SiC microcrystals and free carbon , Its tensile strength and resistivity decrease with the increase of the free carbon contents in fiber .

通过试验得到了高Si3N4含量，低游离碳含量的Si3N4/SiC纳米粉形成的最佳工艺参数。

The optimum processing parameters favourable of the formation of Si_3N_4 / SiC powders with high silicon nitride content and low free carbon content have been obtained .

SiC纤维中的氧和游离碳是影响纤维性能的主要因素，这些杂质直接或间接来源于先驱体PCS，如Si-H等活性基团含量低，碳元素含量偏高等。

The oxygen and free carbon in SiC fiber deteriorate the properties of the fiber . Those components come from the PCS directly or indirectly , such as low amount of Si-H active group and high content of free carbon in PCS.

研究表明，在先驱体中加入活性填料能有效降低陶瓷素坯的气孔率，可与PCS气态裂解产物、游离碳和（或）N2气氛反应生成新的化合物，提高PCS的陶瓷产率。

The results showed that the inclusion of active fillers could decrease the porosity of the green compacts effectively , increase ceramic yields of PCS by reacting with N 2 , free carbon and / or gas volatile of PCS during pyrolysis to produce new compounds .

研究了用美国力可CS-344碳硫测定仪测定金属铍中总碳、化合碳及游离碳的方法。

A method for determination of total carbon , combination carbon and free carbon in beryllium metal with LECO CS-344 carbon / sulphur determinator has been studied .

系统地研究了二茂铁、烧成温度、保温时间、氧含量以及游离碳等因素对Si-Fe-C-O纤维电阻率的影响。

It was systematically studied that specific resistance of Si-Fe-C-O fibers was affected by some factors for example ferrocene 、 sintering temperature 、 holding time 、 Oxygen content and free carbon content and so on .

结果表明：二茂铁的增加、烧成温度的提高和保温时间的延长都有利于Si-Fe-C-O纤维电阻率的降低，而氧含量的增加和游离碳的减少增加了纤维的电阻率。

The results showed the specific resistance of the fibers reduced by adding more ferrocene 、 raising sintering temperature and prolonging holding time , but the result was reversed with more oxygen content and less free carbon content .

同等密度但含少量游离碳的高密度材料耐腐蚀性能更好，在98℃5%HF/5%HNO3（质量分数）中腐蚀30h后失重量仅为中等密度材料的1/17.4。

For example , when corroded by deposited in 5 % HF / 5 % HNO3 ( mass fraction ) solution for 30 hours at high temperature ( 98 ℃), the lost weight of SiC ceramic is only 1 / 17.4 of SiC ceramic of medium density .

建立了较完整的UFD生成机理，建立了爆轰中游离碳聚结成液滴的直接蒙特卡洛方法计算、爆炸热力学条件计算和相变动力学计算程序；

In this paper , we established the synthesize mechanism of UFD , built the direct simulation Monte Carlo computing method for the generation of liquid drops from free carbon through coagulation during detonation , and constructed the computing programs for explosion thermodynamics conditions and phase transition dynamics .

碳化钛粉中总碳、游离碳的测定

Determination of Total Carbon and Free Carbon in Titanium Carbide Powder

添加铬的混合料中游离碳测定方法的研究

Study of Measuring Method of Free Carbon in Mixture Added Chromium

超细碳化硅中游离碳的测定

Determination of Free Carbon in Ultrafine Silicon Carbide Powder

爆轰过程中游离碳的状态研究

Study of Free Carbon State in Detonation

快速测定难熔碳化物中的游离碳

Determination of free carbon in refractory carbides

碳化钨和硬质合金中总碳、化合碳及游离碳测定方法研究

On Determination of Total Carbon , Combined Carbon and Free Carbon in Tungsten Carbides and Cemented Carbides

两种纤维均是由少量β-SiC微晶+Si-O-C非晶态+游离碳组成的多相纤维。

Both types of fiber are multiphase fibers consisted of P-SiC crystalline , Si-C-0 amorphous and free carbon phase .

一般石英纤维表面会涂覆一层有机环氧树脂，该树脂在400～500℃会碳化产生游离碳，从而影响了高温复合材料的界面结合力。

There is epoxy resin which has low heat-resistance and can be carbonized at 400-500 ℃ often on the surface of quartz fiber , so the interfacial behavior of the composites will be influenced .

气相合成的碳氮化钛含微量杂质，包括游离碳和氯根等，主相量显著地受吸附氧量影响，可控制达97%以上。

The synthetic titanium carbo-nitride by CVD contains micro impurities including free carbon , chloride , etc , . The main component amount influenced obviously by adsorption of oxygen can be controlled above 97 % .

在1500～1600℃真空中处理得到的碳化硼粉末，其游离碳消失，平均颗粒尺寸增大为5.8～6.0μm。

If the vacuum heat treating condition is proper , free-C in boron carbide powders can be eliminated , but yet average particle size of boron carbide powders is coarsening to 5.8 ~ 6.0 μ m.

也称为可锻（韧性）铸铁或球状石墨铸铁，以球状石墨形式存在的游离碳使球墨铸铁变得更加坚固。水平连铸铁索体球墨铸铁型材的断裂韧性

" also known as nodular cast iron and spheroidal graphite iron , ductile iron solidifies with free carbon in a spheroidal graphite from . " The Fracture Toughness of Shaped Ferritic Ductile Iron by Horizontal Continuous Cast

非标记乙醇与催化剂上的标记焦炭间的交换反应的实验结果，证明在正常反应条件下最初结在催化剂上的焦炭，大部分既不是游离碳，也不是稠环结构。

A study on the exchange reactions between ethanol and the labelled carbonaceous deposit formed on the catalyst at normal operating conditions revealed that the coke for the greater part was neither free carbon deposit nor condensed aromatics .

研究了双锥混合器的混合时间、填充率、转速对W+C混合粉的碳量均匀程度和碳化钨粉的总碳、游离碳的影响。

In this article , the influence of the the bipyramid blender mixing time , the charge ratio , rotaing speed on the uniformity is studied of the mix of coarse W + C and total carbon / free carbon of tungsten carbide .

该方法适用于测定总碳含量为0.050%～1.00%，及测定游离碳含量为0.006%～0.500%的金属铍样品。

The method is used as determine the sample of content of total carbon in the range of 0 . 050 % - 1 . 00 % , free carbon in the range of 0 . 006 % - 0 . 500 % in metal beryllium .

但是，C/C属于生物惰性材料，未经处理的C/C表面具有疏水性，长期置于人体中，脱落的游离碳会随体液流动，沉积到表面皮肤，造成黑肤效应。

However , C / C composites are bio-inert ; the surface of C / C composites without any treatment is hydrophobic . The dissociative carbon can flow with body fluids and thus cause " black skin effect " due to the carbon deposition within the skin .

利用核磁技术确定游离羟基碳苷的结构和构型

Affirming structure and configuration of free hydroxyl C glycosides by NMR

确定游离羟基碳苷的结构和苷键的构型。

Objective : To affirm structure and glycosidic bond configuration of free hydroxyl C glycosides .

覆膜处理，紧结态碳占总腐碳的百分数随土壤中总腐碳含量增加而增加，覆膜处理游离态碳均低于对照处理。

Under plastic films , the percentage of the tight state carbon is increased along with the increase of the content of total humus carbon in the soil .