CRYSTALLIZATION behavior of polypropylene/graphene nanoplatelets (PP/GnPs) nanocomposite fiber was studied by means of differential scanning calorimetry. PP/GnPs nanocomposite fibers containing different amounts of GnPs were prepared with and without a compatibilizer, maleic anhydride-grafted polypropylene (PP-g-MA), and then isothermal CRYSTALLIZATION kinetics was investigated at different CRYSTALLIZATION temperatures by Avrami and Lauritzen-Hoffman equations. The results show that heterogeneous nucleation occurs easily in the presence of GnPs even at higher temperatures and thereby the CRYSTALLIZATION rate of PP in the PP/GnPs fiber increased. Moreover, upon inclusion of PP-g-MA, relative crystallinity-time curves shifted to the shorter times. The Avrami equation revealed that although GnPs and PP-g-MA have nucleation effect, the crystal growth of PP is restricted in the PP/PP-g-MA/GnPs nanocomposite fiber, increasing the CRYSTALLIZATION half-time. Furthermore, Avrami exponent of approximately 3 for neat PP and 2 for PP/GnPs is consistent with three-dimensional crystal growth process and two-dimensional crystal growth, respectively. According to Lauritzen-Hoffman equation, the nucleation parameter decreased with the addition of GnPs, suggesting that the GnPs act as a nucleating agent and also reduced the interfacial free energy.

Octogen or HMX is one of the most powerful explosives which produced in large scale. CRYSTALLIZATION is one of the most critical steps in production of HMX. This paper is related to an invention to produce crystalline HMX with 1 micron average particle size, when the particle size of explosive reaches the grade of sub-micron, it impact sensitivity reduces sharply. In this research all affecting parameters such as solvent and antisolvent, mixing speed, concentration are optimized. Easy to adjust parameters affecting on particle size, short operation time are the main special characteristics of this method. Other advantages are easy to nucleation, continually super saturation condition during particle growth and improving the crystal defects.In this method ultrafine HMX is produced due to decreasing of HMX solubility with addition of HMX solution to an antisolvent.

The CRYSTALLIZATION behavior of Ni-Nb amorphous alloys containing 20, 40 and 60 at.% Nb was studied with a combination of differential scanning calorimetry and x-ray diffractometry. The CRYSTALLIZATION sequences were analyzed with regard to the free energy versus composition curves of Ni-Nb system. The CRYSTALLIZATION of Ni80Nb20 and Ni40Nb60 amorphous alloys appeared to occur with a primary CRYSTALLIZATION mechanism. Whereas Ni6oNb4oamorphous alloy crystallized with an eutectic CRYSTALLIZATION behavior. The Ni60Nb40 amorphous alloy was found to be the most stable alloy on heating among three investigated Ni-Nb amorphous alloys.

In this study, the CRYSTALLIZATION behavior of melt-spun Al87Ni10La3 amorphous phase was investigated by using X-ray diffraction and non-isothermal differential thermal analysis techniques. The results demonstrated that the amorphous phase exhibited two-stage CRYSTALLIZATION on heating, i. e., at first step the amorphous phase transforms into α-Al phase and at second step Al11La3 and Al3Ni intermetallic phases precipitate, simultaneously. The activation energies of the CRYSTALLIZATIONs of the amorphous phase were evaluated by the Kissinger equation using the peak temperature of the exothermic reactions. The values of two-step CRYSTALLIZATION activation energies were approximately 173. 7± 6 and 278. 4± 5 kJ/mol, respectively. The Avrami index was calculated for the first and second step of CRYSTALLIZATIONs and obtained 0. 9 and 3. 8 respectively. This kinetics investigation indicated that in the first step of CRYSTALLIZATION of Al87Ni10La3 alloy, the nucleation rate decreases with time, and the CRYSTALLIZATION is governed by a three-dimensional diffusion-controlled growth, while the second stage was in interface control regime.

Qualitative research is consistent with the emerging postmodern theory, has seen extensive changes. Indeterminacy of knowledge, representations in the vast and use of mixed genres, lead to new horizons beyond those that have made a qualitative research design are CRYSTALLIZATION opened. Providing meaningful puzzle, reflection of several contrasting approaches to understanding with the of mutually exclusive concepts together, including cases in which qualitative research can be found CRYSTALLIZATION. CRYSTALLIZATION is a postmodern approach to qualitative research, that, featuring in-depth descriptions of the multiple genres, the method for integrating threads and patterns of life experiences. However, this paper aim is to outline a new approach to CRYSTALLIZATION, and its use in connection with human phenomena to be explained in detail.