Effect of aging time

A more quantitative study has been performed [57] by considering the temperature dependence of the strain of yielding for the occurrence of SDZs and crazes. The effects of ageing time at 130 °C and of MW were also considered. The results are shown in Fig. 78. 

Intergranular stress-corrosion cracking (IG-SCC) can occur in some sensitized materials when placed under tensile stress. Thus DL-EPR has been used to study the effects of aging time on the susceptibility of Alloy 600 to IGSCC, as shown in Fig. 41 (39). This work also shows the need to modify the experimental parameters of the test to achieve optimal correlation for alloys other than Type 304SS, in this case lowering the KCNS concentration and the temperature while raising the peak potential and the scan rate. 

Figure 11.7. A. NMR spectra of an Al-Mg alloy containing zinc, showing the signal from the matrix (upper) and from the precipitate, represented by stoichiometric MgnAli2 (lower). The 2 middle spectra show the effect of aging time at 200°C on the relative amounts of matrix and precipitate phases. B. Knight shift of the matrix of binary Mg-Al alloys as a function of aluminium content. C. Knight shift of the precipitate phase in Mg-Al alloys doped with zinc as a function of the Zn content. From Celotto and Bastow (2001) by permission of Elsevier Science.

Table 3.12 Effect of aging time on the crystallization of the product under microwave irradiation...

Figures 3 through 6 illustrate the effect of aging time on consistency and disintegration, as well as the relationship between consistency and disintegration for continuously calcined Terra Alba. These data show that both consistency and disintegration decrease with time and suggest a linear relationship exists between these properties. Regression analysis of the data yields slopes, intercepts, and correlation coefficients of these curves a.s given in Table 2. Similar data for batch calcined stucco are summarized in Table 3.

Effect of aging time on the relaxation peak temperatures for gelatinized starch at different sucrose contents 0% ( ), 5% ( ), 10% (A), and 20% ( ) equilibrated at = 0.66 and for comparison for starch 20% sucrose ( ) equilibrated over P2O5 (error bars are confidence intervals). Inset corresponding DSC traces for the samples equilibrated at = 0.66. 

Peltola, T., Jokinen, M., Rahiala, H., Patsi, M., Heikkila, J., Kangasniemi, I., and Yli-Urpo, A. (2000) Effect of aging time of sol on structure and in vitro calcium phosphate formation of sol-gel-derived titania films. / Biomed. Mater. Res., 51 (2), 200 —208. 

At first, the effect of ageing time on precipitation and growth of particles has been studied. The characterisation of particles aged for various duration shows that one week aged boehmite particles have reached their thermodynamic stability (table 1), so that their different morphologies do not result from any kinetic effect. Hereafter, we discuss only boehmite materials obtained for one week ageing. 

Liquid preconditioning with medium mineralized water at equilibrium proved to be efficient for two important reasons it improves test reproducibility and it minimizes the effect of ageing time of the material. 

Fig. 5 shows the effect of aging time on the permeability coefficient for oxygen in PMSP, poly(TMSP-co-PP), and PMSP/PPP blend membranes at 30°C. This figure also shows the effect of PP content in the copolymer and PPP content... 

FIGURE 13 Effect of aging time on beads catalytic activity. 

Figure 13.48 Effect of ageing time at 90 °C on the tensile strength of SPNR/PSf containing 50% cofibre (author s experiment).

The effect of aging time was also mentioned by Alio et al. [140], who qualitatively observed a continuous increment in solution viscosity during electrospinning of a sol containing TEOS and PCL, which highlighted the importance of finding the proper window of operation for spinnability. 

Cristiani, C. Valentini, M, Merazzi, M, Neglia, S. Forzatti, P. Effect of aging time on chemical and rheological evolution in y-AI2O3 slurries for dip-coating. Catal. Today 2005 105 492-498. 

Figure 6.10 Effect of aging time on polarization of 2195 Al-Li alloy iQ deaerated 3.5 % sodium chloride solution [40].

Raudaskoski R, Niemela MV, Keiski RL (2007) The effect of ageing time on co-precipitated Cu/ZnO/Zr02 catalysts used in methanol synthesis from CO2 and H2. Top Catal 45 57-60... 

Effect of aging time on the tensile strength of longitudinal sheet. Source R.A. Wood, Beta Titanium Alloys, MCIC- -11, Battelle Columbus Laboratories, 1972... 

Smitha, S., Shajesh, P., Aravind, P.R., Rajesh Kumar, S., Krishna Pillai, P., and Warrier, K.G.K. (2006) Effect of aging time and concentration of aging solution on the porosity characteristics of subcritically dried silica. Microporous Mesoporous Mater., 91, 286-292. 

Raudaskoski, R. Niemela, M. V. Keiski, R. L. The Effect of Ageing time on Coprecipitated Cu/ZnO/ZiOj Catalysts used in Methanol Synthesis from CO and H. Top. Catal 2007,45, 57-60. 

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