排序方式: 共有24条查询结果,搜索用时 13 毫秒
1.
Zushu Li Kenneth C. Mills Malcolm McLean Kusuhiro Mukai 《Metallurgical and Materials Transactions B》2005,36(2):247-254
The densities of three Ni-based superalloys have been measured in both liquid and mushy states by both a modified sessile
drop method (MSDM) and a modified pycnometric method (MPM) for alloys CMSX-4 and CM186LC, and for CMSX-10 alloy by MSDM only.
The surface tensions of liquid CMSX-4, CM186LC, and CMSX-10 superalloys were measured using the sessile drop method. All measurements
were carried out in a highly purified argon atmosphere with the oxygen partial pressure of less than 10−19 MPa in the gas outlet. The densities of all superalloys in both liquid and mushy states were found to decrease with increasing
temperature. The volume thermal expansion of each superalloy in the mushy state was found to be higher than that in the liquid
state. The densities determined by different methods have been critically assessed and recommended values in both liquid and
mushy states are given as a linear function of temperature for the three Ni-based superalloys. The surface tension of liquid
CMSX-4 superalloy was found to decrease with increasing temperature, while that of liquid CMSX-10 superalloy increases with
increasing temperature. The wetting behavior of liquid CM186LC on the alumina substrate was found (1) to differ significantly
from that of CMSX-4 and CMSX-10 and (2) to vary with time. A HfO2-rich layer was found in the contact area of CM186LC with the alumina substrate, which could lead to some uncertainty in the
value obtained for the surface tension determined for CM186LC. 相似文献
2.
3.
4.
TAKAO MUKAI NAOFUMI WATANABE TAKAHIRO TOBA TAKATOSHI ITOH SUSUMU ADACHI 《Journal of food science》1991,56(4):1017-1018
A water soluble polysaccharide “kefiran” produced by Lactobacillus kefiranofaciens was examined for its gel-forming and rheological properties. Kefiran (3%) formed gel in the presence of ethanol (4–10%). The gel strength in 8% ethanol was comparable to that of 3% gelatin gel in water. Addition of casein (3%) increased gel strength 1.5–2.0 fold. The unique properties of kefiran may make it a useful food additive. 相似文献
5.
Experiments were carried out on the carburisation, desulphurisation and temperature rise of the semi‐steel in a plasma induction furnace. Influences of many factors, such as power supply, structure and positioning of the plasma torch and bottom‐blown‐gas stirring, on heating efficiency and melt temperature distribution were studied. During carburisation of the semi‐steel, plasma heating could effectively control the melt temperature, consequently, the carbon mass content of semi‐steel increased from 1.92 to 4.58 % with the utilisation efficiency of carbon reached up to 61.57 %, and the desulphurisation ratio could be beyond 66.58 %. 相似文献
6.
FANGLiang XIAOFeng TAOZainan KusuhiroMukai 《武汉理工大学学报(材料科学英文版)》2005,20(2):67-70
The density of liquid Ni- Ta alloys was measured by using a modified sessile drop method. It is found that the density of the liquid Ni- Ta alloys decreases with the increasing temperature, but increases with the increase of tantalum concentration in the alloys. The molar volume of liquid Ni- Ta binary alloys increases with the increase of temperature ancl tantalum concentration. 相似文献
7.
用改良密度法对熔融Ni—Ta二元合金的液态密度进行了精密测量。结果表明:熔融Ni-Ta二元合金的密度随温度的增加而减少,但随合金中钽浓度的增加而增加:熔融Ni-Ta二元合金的摩尔体积随温度和合金中钽浓度的增加而增加,并对钽在熔融Ni-Ta二元合金中的偏摩尔体积进行了计算。 相似文献
8.
9.
方亮 《武汉理工大学学报(材料科学英文版)》2005,20(3):84-87
1IntroductionNi-based heat-resistant superalloys are widely usedto make critical components in gas-turbine engines,suchas bladeetc.But they are very hard and difficult to bemachined,the net-shape machining of these materials isveryimportant.Computer simul… 相似文献
10.
Kusuhiro Mukai Zushu Li Kenneth C. Mills 《Metallurgical and Materials Transactions B》2005,36(2):255-262
The molar volume of nickel and the partial molar volumes of Cr, Co, W, Ta, Al, Mo, and Re are computed from the densities
of liquid nickel and liquid Ni-based binary alloys measured by the modified sessile drop method (MSDM) and the modified pycnometric
method (MPM). The molar volumes of Hf, Nb, and Ti are calculated from the literature density values of these elements. A prediction
model for the densities of liquid Ni-based alloys is developed based on the obtained molar/partial molar volumes of the elements
in liquid Ni-based alloys. The validity of this model is verified by the density data of liquid Ni-based ternary (Ni-Co-Al),
quaternary (Ni-Co-Al-Cr, Ni-Co-Al-Mo, and Ni-Cr-Al-Mo), and commercial alloys measured by both MSDM and MPM. It is also verified
by the density values of liquid Ni-based commercial alloys in the literature. It has been shown that the present model can
provide reasonable estimation for the density and its temperature dependency of liquid Ni-based alloys. The difference between
the predicted value and the measured/cited value is within ±2.5 pct. 相似文献