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cementation, illite cementation and late carbonate cementation strengthen the formation of tight reservoir. Dissolution and chlorite cementation are the main types of constructive diagenesis. Longitudinal..., 19(3): 7-12. HUANG Sijing, HUANG Peipei, WANG Qingdong, et al. The significance of cementation in porosity preservation in deep-buried sandstones[J]. Lithologic Reservoirs, 2007, 19(3): 7-12. [13......
Nb合金的保护涂层 () 摘要: 航空航天工业要求材料在高温条件下具有较高性能,因此难熔金属基合金已成为替代Ni基超合金的首选材料.Nb在难熔金属中密度较低,得到广泛关注,但在氧化环境下,Nb及Nb合金性能急剧下降,通过改良合金的方法虽然能提高其抗氧化性能,但却不能保证其机械加工性能,因此,有必要研制一种Nb合金氧化环境下的高温保护涂层.在众多涂层工艺中,固体渗入法(Pack Cementation)是最有前途的方法之一.该法通过对PC工艺进行改进,发展了一种3,4种元素共沉积的单级固体渗入工艺. [全文内容正在添加中] ......
are in A2 sub-stage of mesodiagenesis stage, which have mainly experienced compaction, cementation, hydrocarbon emplacement and dissolution. Compaction and cementation are the dominant factors that lead to a reservoir with low-porosity and low-permeability. The average primary porosity of the reservoir is reduced by 17.2% by compaction and 14.7% by cementation respectively. In the process......
is the continuous Al2O3 where a lot of Si particles adhered; the inner layer is most of Ti5Si3 with amount of Al2O3 particles dispersed in. It was deduced that the Al2O3 in the cementation layer is formed by the Al......
Chromized Layers Produced on Steel Surface by Means of CVD TORBUS Roman1,JEZIORSKI Leopold1,KASPRZYCKA Ewa1,BOGDA2,JASI3 (1.N;2.N)SKI Bogdan(N;3.N)SKI J(o)zef(N) 摘要:Chemical vapour deposition of chromium on the surface of carbon steel has been investigated using a novel CVD method that combines the low cost of pack cementation method with advantages of vacuum technique. The processes have been......
Effect of Thermal Shock and Oxidation on Mechanical Property of Carbon/Carbon Composites with a Silicide Coating () 摘要:A SiC whisker-toughened MoSi_2-SiC-Si coating was prepared on carbon/carbon (C/C) composites surface by a two-step technique of slurry and pack cementation, and the effects of thermal shock and oxidation on the mechanical property of the coated C/C were studied. The flexural......
Thermal Fatigue Behavior of SiC/MBAS Glass Coated Carbon/Carbon Composites () 摘要:The thermal fatigue behavior of C/C composites coated with the SiC/MBAS glass (MoSi_2 particle-containing boron aluminosilicate glass) coating, prepared by the two-step process of the pack cementation and procoating-sintering, was investigated in present paper. The experimental results indicated that the SiC/MBAS......
Effect of Mo/Si Ratio on the Microstructure and Oxidation Resistance of Si-Mo Coating for C/C Composites () 摘要:Oxidation protective Si-Mo coatings were prepared by pack cementation on the surface of C/SiC coated carbon/carbon composites. The influences of Mo/Si mass ratio in the pack powders on the microstructure and oxidation resistance of the coating were investigated. It showed......
SiC/Si-W-Mo coating was prepared by a two-step pack cementation technique. The microstructures and the phase composition of the as-received multi-coating were examined by scanning electron microscopy......
cementation aluminizing.Hot corrosion behavior of the Cr-modified aluminide coating exposed to molten Na2SO4/K2SO4(3:1) or Na2SO4/NaCl(3:1) salts at 900 °C in static air are evaluated as well......
