Effect of Cryomilling on Particle Size and Microstrain in a WC-Co Alloy

Abstract

The effects of temperature and milling time on the crystalline size and microstrain in WC and WC-Co powders were investigated in a cryomilling process. Within the limit of the analytical methods and TEM, the crystalline size of WC was estimated to be in the range of 50$70 nm after 10 h of cryomilling. The presence of Co in the WC-Co system significantly reduced the level of strain in the WC particles in this low-temperature processing. A thermal cycle employed in cryomilling process was also found to be useful in various aspects. Various fitting methods were compared and the results are discussed in relation to processing parameters.

Synthesis of Magnetite Nanoparticles by Top‐Down Approach from a High Purity Ore

“…Although chemical precipitation method has been identified as the most economical and practical method for magnetite nanoparticle synthesis, top-down approach involving crushing, milling, or grinding offers a simple environmentally friendly synthetic route despite the long grinding times involved [31]. Due to that interest, in very recent years, high energy ball milling has extensively been used to study the effect on the particle size, crystallite size, and lattice strain in metals, metal oxides, metal alloys, and so forth [32][33][34][35]. Physicochemical properties of ball milled boron particles under two grinding techniques such as dry and wet grinding were investigated by Jung et al [36].…”

Cryomilling as environmentally friendly synthesis route to prepare nanomaterials

“…In these experiments, the two metallic strips of the pure metal were degreased using methanol, scratched for removing the oxide layer, and then riveted together to avoid any deflection between both strips during the deformation. Subsequently, the riveted strips were deformed by different amount (30,40,50,60,70, 80%) at various temperatures (27, 0 and −196°C) for cold weld formation [schematics diagram shown in Figure 4(b)]. It is evident that the coldwelded joints of both Al and Cu exhibit higher bond strength at RT as well as after 70 and 80% deformation, respectively.…”

“…The cryomilling has also be used for waste beneficiation for electronics waste (e-waste), plastic-rich automotive waste [57,58]. Similarly, cryomilling has extensively been used to synthesise nanoscaled ceramic and cermets [59], such as WC-Co [60], Al-AlN [14], B 4 C-Al [61], Fe 2 O 3 -Al [62], etc. Halide nanocrystals (NaCl, KCl, CsCl) can be obtained via cryomilling [63][64][65].…”

“…Similarly, cryomilling has extensively been used to synthesize nanoscaled ceramic and cermets [59], such as WC-Co [60], Al-AlN [14], B4C-Al [61], Fe2O3-Al [62], etc. Halide nanocrystals (NaCl, KCl, CsCl) can be obtained via cryomilling [63][64][65].…”

Normal ve Kriyojenik Şartlarda Öğütmenin Aktive Edilmiş Sinterleme Süreçleri ile Geliştirilen Tungsten Esaslı Kompozitlerin Mikroyapı ve Özellikleri Üzerindeki Etkisi

“…However, milling under different conditions and its effects on the microstructure and final properties of the W sintered bodies are not a considerably discussed topic [22]. The addition of transition metal diborides as well as oxide particles and milling of these powders under cryogenic conditions can be suggested as an alternative powder preparation technique for tungsten matrix composites [22][23].…”