The carbon felt reinforced HfC-C/C and C/C composite integrated throats were prepared by thermal gradient chemical vapour infiltration process,and their ablation resistance was determined by using an equipment of solid rocket motor under the pressure of 7MPa.
采用热梯度化学气相沉积工艺制备了碳化铪改性和未改性整体炭毡增强的炭/炭(C/C)复合材料整体喉衬,采用小型固体火箭发动机试车台装置(平均工作压强为7MPa)测定了它们的烧蚀性能。
Result shows hafnium carbide formed on the surface of CNT films at annealing temperature of 1200℃,which improved the field emission current densities,emission uniformity and emission stability for CNT films.
研究结果表明在适当的退火温度下碳纳米管表面形成了碳化铪,并显著提高了碳纳米管的发射电流密度、发射均匀性和发射稳定性。
To prevent the ablation of carbon fiber reinforced carbon(C/C) composites from high temperature,a silicon carbide-hafnium silicide-tantalum disilicide(SiC-HfSi2-TaSi2) compound coating with high temperature anti-ablation ability was prepared on the surface of C/C composites by a calcining technique of pack cementation.
采用包埋技术在碳纤维增强碳(carbon fiber reinforced carbon,C/C)复合材料表面制备了碳化硅-硅化铪-硅化钽(SiC-HfSi2-TaSi2)抗烧蚀复合涂层。
The improvement field emission by Hf coating on CNTs surface is attributed to the low work function, chemical inertness and good conductivity of HfC.
我们认为碳纳米管表面发射性能的提高归功于表面碳化铪膜良好的导电性、学惰性和低逸出功。
Chemical form of hafnium is perchlorate or nitrate.
铪的化学形态为过氯酸盐或硝酸盐。
EFFECT OF HF ON IONITRIDING OF MOLYBDENUM ALLOY
铪在钼合金离子氮化中的作用和影响
Self-Assembled Monolayers Preparation of HfO_2 Thin Film
二氧化铪(HfO_2)薄膜的自组装制备
Zirconium and hafnium oxides--Determination of zirconium(hafnium) oxide contents--Mandelic acid gravimetric method
GB/T2590.1-1981氧化锆、氧化铪中氧化锆和氧化铪含量的测定(苦杏仁酸重量法)
Zirconium oxide--Determination of hafnium oxide content--Emission spectrophotometric method
GB/T2590.8-1981氧化锆中氧化铪量的测定(发射光谱法)
Synthesis of Nanocrystalline Hafnium Oxide Thin Film by Self-Assembled Monolayer Method
二氧化铪（HfO_2）纳米晶态薄膜的自组装制备
Self-Assembled Monolayers Preparation and Characterization of HfO_2 Film
二氧化铪(HfO_2)晶态薄膜的液相自组装制备与表征
Zirconium and hafnium oxides--Determination of iron content--Sulfosalicylic acid photometric method
GB/T2590.2-1981氧化锆、氧化铪中铁量的测定(磺基水杨酸吸光光度法)
Zirconium and hafnium oxides--Determination of silicon content--Silicon-molybdenum blue photometric method
GB/T2590.3-1981氧化锆、氧化铪中硅量的测定硅钼蓝吸光光度法
Zirconium and hafnium oxides--Determination of sodium content--Flame atomic absorption spectrophotometric method
GB/T2590.5-1981氧化锆、氧化铪中钠量的测定火焰原子吸收分光光度法
Zirconium and hafnium oxides--Determination of titanium content--Diantipyrymethane photometric method
GB/T2590.6-1981氧化锆、氧化铪中钛量的测定(二安替吡啉甲烷吸光光度法)
Hafnium oxide--Determination of zirconium oxide content--X-ray fluorescence spectrometric method
GB/T2590.9-1981氧化铪中氧化锆量的测定(x射线荧光光谱法)
Methods for chemical analysis of bauxite ores--The semixylenol orange photometric method for determination of zirconium (hafnium)oxide content
GB/T3257.14-1982铝土矿化学分析方法半二甲酚橙光度法测定二氧化锆(铪)量
Zirconium and hafnium oxides--Determination of phosphorus content--Ascorbic acid reduced molybdoantimonylphosphoric acid absorption photometric method
GB/T2590.7-1981氧化锆、氧化铪中磷量的测定(锑盐-抗坏血酸钼蓝吸光光度法)
Characterization of hafnium oxide coatings on low activation Martensitic steel at various O_2/Ar flow ratios
氧氩比对低活化马氏体钢表面氧化铪涂层性能的影响
Determination of zirconium oxide and hafnium oxide in mineral and reagent by X-ray fluorescence spectrometry
X射线荧光光谱法测定矿物及试剂中氧化锆和氧化铪
The field emission properties of hafnium coated carbon nanotubes( CNTs) were investigated.
研究了表面沉积铪膜并进行后处理对碳纳米管膜场电子发射性能的影响。