Mechanical alloying of Fe and Cr: Structural and magnetic studies

Mössbauer investigation of intermixing during ball milling ofFe0.3Cr0.7Caër1, Delcroix2, Shen3 et al. 1996Phys. Rev. B493130View full textAdd to dashboardCite

“…We observe nevertheless that they share ''quasiuniversal'' characteristics in spite of differences in equilibrium phase diagrams of the investigated systems, differences in chemical compositions of the ground powder mixtures and differences in the nature of the final products: an intermetallic compound in the case TϭSi, a mixture of an amorphous phase and of a W-rich W-Fe bcc solid solution for TϭW, a mixture of a homogeneous bcc alloy and of an amorphous phase for TϭCr. [27][28][29] The ''quasiuniversal'' characteristics of the steady distribution shapes which are observed for sufficiently large values of ͑у hf ϳ0.4-0.6͒ are ͑Sec. III B͒ a sharp peak at a field which is close to the field of ␣-Fe at RT ͑H Fe ϭ331 kG͒ and is associated with about 1/3 of the magnetic Fe atoms ͑0.34, 0.31, 0.38 for TϭSi, Cr, and W, respectively͒ and a rather flat and broad band down to ϳ50-100 kG.…”

“…It looks similar to spectra of p-Fe 0.28 Cr 0.72 recorded at 4 K as a function of milling time for samples ground with two types of mills different from the planetary mills used here. 27 The spectrum ͓Fig. 9͑a͔͒ is composed of three main contributions.…”

“…[23][24][25][26][27][28][29] The samples were ground with different types of mills for instance, vibratory, planetary, etc., either with high-or lowenergy mills ͓see for instance Fig. 1͑b͒ Iron contamination cannot play a major role in determining the stationary P(H) shape as it has been shown to be negligible in the case of TϭCr and as grinding was performed with tungsten carbide tools for TϭSi.…”

Mössbauer study on the disordered Fe60Cr40 alloys prepared by mechanical alloying

“…The Fe-Cr systems exhibit the peculiarities of small heats of mixing and a wide miscibility gap in the phase diagram where both Fe and Cr are insoluble at room temperature. MA of Fe-Cr system has been widely investigated [5][6][7][8][9][10][11][12][13][14] and much attention has been paid to the study of the structural characteristics and of the physical properties of final products. It has been established that the product phase presents an extensive metastable behavior resulting in the formation of disordered BCC solid solutions or paramagnetic amorphous phases at 300 K depending on the Cr composition and on the preparation procedure.…”

Structural and Photoacoustic Study of Cr11Ge19 Prepared by Mechanical Alloying

“…Mechanical Alloying (MA) is a technique where moderate pressures are applied, and has been used as an alternative way for synthesizing crystalline 12 , nanostructured 13 , amorphous 14 , and solid solution phases 15 . MA has many advantages including processing at low temperatures, easy composition control, use of relatively inexpensive equipment and the possibility of scaling up.…”