The family became a major political issue in the UK during the 1990s as policy makers began to recognize the rapid pace of family change. In the space of a generation the numbers marrying have halved, the numbers divorcing trebled and th... J Lewis - Palgrave Macmillan UK 被引量: 1发表...
This behavior can be attributed to the change of three main parameters including the average nanoparticle size, the surface chemical composition and the surface charge of the nanoadsorbent in the reactional medium (pH11). These parameters could be significantly affected by the heat treatment temperatu...
It is also noteworthy that, after adding t-BuOH to mimic the solvent system used in the reaction, a significant N–H chemical shift change from 7.19 to 9.14 ppm was observed, which suggested a beneficial N–H acidity enhancement in the presence of t-BuOH (see Figure S16).47 Under such...
For the equilibrium from pure chemical driving force ΔGV=0, the free Gibbs energy is given:(1)ΔGTi=-RTlnXeq-Ω1-Xeq2where ΔGTi is the difference in free energy of Ti between η-Ni3Ti precipitation and γ matrix. Xeq is the mole fraction of Ti atoms and Ω is the change in ...
EBSD was used to semi-quantitatively determine the GND density following the compression test. Micrographs of the different samples are shown in Fig. 12 (a-d), showing the evident γ/γ' morphologies. The volume fraction of γ' precipitates did not change significantly below 1000 °C, while ...
As the nucleation sites (Al3Ti) change in composition depending on the percentage of Si in the alloy, the term “poisoning” frequently used to explain the loss or weakening of the power of the refiner, is misused. Addition of L12 metals e.g., Zr and Sc would contribute to ...
When crystallographic cracks propagate across GBs, they need to change the slip plane so as to be favorable to continuous crack extension. The process requires a certain energy to fracture the hatched area in Fig. 9, dependent upon the twist angle. Hence, the twist angle can contribute primary...
Furthermore, the shape and size of the β-Sn phase change compared to Sn2.5Ag0.7Cu. Moreover, there are changes in the shape and size of β-Sn compared to Sn3.0Ag0.5Cu. The average size of β-Sn decreased to 41.5 μm, gradually becoming more uniform and tending toward elliptical ...
The temperature change of Ni47Ti44Nb9 alloy under different temperature and strain rate is shown in Fig. 6. When the strain rate was less than 1 s−1 (700 °C), the specimen temperature of Ni47Ti44Nb9 alloy keeps at the set value during the compression process. When the strain ...
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