The key process parameters for the double-heating synthesis of silicon carbide whiskers with carbon black and SiO2 powders as raw materials are studied. 双重加热法是低成本、大批量合成碳化硅晶须的新技术,合成温度低、合成时间短、生成率高。
The system pressure changed the adsorption abilities and pore size distributions of carbide and activated carbon. Chain reaction: Process yielding products that initiate further processes of the same kind. 反应压力能够改变炭化产物和活化产物的吸附性能和孔径分布。链锁反应:物理和化学术语。反应生成的产物能进一步引发同类反应的自行延续过程。
A solid solution of ferric carbide or carbon in iron; cools to form pearlite or martensite. 含铁碳化物或含碳铁的固体溶体,冷却可形成珠光体或马氏体。
In order to detect the carbide network in high carbon hypereutectoid steel wire rods accurately, two kinds of detection method of the carbide network are compared. 为了准确地检验高碳过共析钢盘条中的网状渗碳体,分别对选用硝酸酒精溶液侵蚀和碱性苦味酸钠水溶液热侵蚀两种显示方法进行了比较。
Study of Preparation and Synthesis Mechanism of Silicon Carbide Nanowires from Carbon and Silicon Powders C-Si粉体反应制备SiC纳米线及合成机理研究
Morphology and Formation Mechanism of Bainite Carbide of High Carbon Chromium-Molybdenum Steel 高碳铬钼钢贝氏体碳化物形貌及形成机理
Alloy cast iron coupling roller used in sugar cane pressing Preliminary inquisition for feasibility of using cemented carbide/ carbon steel composite mill roller 合金铸铁甘蔗压榨耦辊硬质合金/碳钢复合轧辊的可行性初探
The system pressure changed the adsorption abilities and pore size distributions of carbide and activated carbon. 反应压力能够改变炭化产物和活化产物的吸附性能和孔径分布。
The results showed that methane exhibited rather high decomposition activity and carbide carbon and graphitic carbon were detected. 结果表明,甲烷具有相当高的裂解积炭活性,裂解后生成炭化物(carbide炭)和石墨炭两种不同活性的炭种;
The activated sintering kinetics of boron carbide with carbon as activator were also researched, the results showed that the main transport mechanism was grain boundary diffusion. 研究了掺碳碳化硼烧结动力学,得出其物质迁移机制主要为晶界扩散。
It was pointed out that the main governing factors were prior austenite size, carbide size and carbon content in the martensites. 指出:奥氏体晶粒大小、碳化物尺寸及马氏体中含碳量是主要控制因素。
The changements of the properties ( weight. volume density. electric resistivity, compressive strength) of boron carbide/ carbon composites during oxidation at 800 ℃ and 2L/ min dry air flow rate were investigated. 考察了B4C/C复合材料在800℃、2L/min干燥空气流量的氧化环境下其性能参数如重量、体积、密度、电阻率、抗压强度的变化情况。
The composite film consisting of titanium carbide and amorphous carbon phases has relative lower intensive stress comparing with diamond like carbon films. 与类金刚石碳膜相比,含有TiC相和a-C:H相的复合膜具有较低的内应力,且随膜中Ti元素含量的变化,膜的成分结构及性能,特别是力学及摩擦学性能发生较大的改变。
Activated sintering and sintering kinetics of boron carbide with carbon as activator 掺碳碳化硼活化烧结及其动力学
This paper reviewed the research progresses in novel fiber absorbing materials such as carbon fiber, silicon carbide fiber, silicon carbide/ carbon fiber, polycrystalline iron fiber, absorbing materials like nano carbon tube and nano iron, and conductive polymer absorbing materials. 综述了新型碳纤维、碳化硅纤维、碳化硅/碳纤维、多晶铁纤维吸波材料、碳纳米管、纳米铁吸波材料和导电高分子吸波材料的研究状况。
Synthesis of Ultrafine and Nano Scaled Tungsten Carbide by Colloidal Carbon Coated Precursor Processes 胶状碳包覆前驱体工艺制备超细、纳米碳化钨粉的研究
In this paper, the progress of 2200~ 3000 ℃ ultrahigh temperature and oxidation resistance composites is reviewed, which includes refractory metal and alloy, ceramics, refractory carbide and oxidation-resistance carbon/ carbon composites. 综述了国外新一代可重复使用液体火箭发动机用超高温抗氧化材料的研究进展,主要包括难熔金属及合金、难熔陶瓷材料、难熔碳化物、难熔硼化物和抗氧化C/C复合材料。
Comparison between calculated and experimental adsorption data showed that the prediction was satisfactory, and the average deviations between the calculated and experimental values for Shanghai made Carbon and Union Carbide Carbon were 1.8% and 3.1% respectively. 吸附量预计值和实验值的比较,表明预计是令人满意的。对于国产活性炭和美国联合炭化合物公司活性炭,其预计值和实验值的平均相对误差分别为1.8%和3.1%。
The technique of centrifugal casting was used. Study on Freeze-Casting of Aqueous Silicon Carbide/ Carbon Black Slurry 采用离心浇注法成型。水基碳化硅/炭黑料浆冷冻浇注成型工艺研究
Influence of Deformation on Precipitation of Carbide in Low Carbon Steel 形变对低碳钢中碳化物析出的影响
Given is the development status in recent 40 year in Ningxia as to coal cleaning and process, coal coking, manufacture of electrode paste, carbon block, calcined coal, activated carbon, silicon carbide, carbon black from gas, and coal gasification and liquefaction. 阐述了近40年来宁夏在煤炭洗选加工,煤炭炼焦,煤制电极糊、炭块、煅料、活性炭、碳化硅、瓦斯炭黑及煤炭气化和液化等方面的发展情况;
A dynamic equation has been established for calculation of thickness increase of graded layer when cemented carbide with carbon content below stoichiometric one is carburized. 建立了低于化学计量碳含量的硬质合金在渗碳处理时梯度层厚度增长的动力学方程。
Coating silicon carbide on carbon fibres by PVD 用物理溅射法在碳纤维表面涂覆SiC
Effect of Aluminium Alloying on Precipitation Behaviour of Proeutectoid Carbide in Ultra-high Carbon Steels 铝合金化对超高碳钢先共析碳化物析出行为的影响
Ce-Carbide in High Carbon Steel 高碳钢中的铈碳化物
Reaction-bonded B4C/ SiC was fabricated by gel-casting using silicon carbide, boron carbide and carbon black as raw materials in this subject. 本课题以SiC、B4C粉末和碳黑为原料,采用凝胶注模工艺成型,制备反应烧结B4C/SiC复合材料。
It is found that room temperature blue light can be obtained from the hydrogen-implanted silicon carbide with proper carbon content. The annealing temperature influences the luminescence obviously. 摘要首次研究了硅中碳氢共注样品的发光性能c发现在适当碳含量的碳化硅样品中注入氢可以获得室温蓝光发射,追火温度对荧光有明显的影响。
The relationship between temperature and the crystal growth rate of silicon carbide has been analyzed theoretically. ( 3) The crystal growths of Silicon carbide with different carbon atomic concentrations at 2900K have been performed. 并从理论上对温度与碳化硅晶体生长速率之间的关系加以了分析。