Review of cold spraying and its use for metallic glass coatings

Abstract

Cold spraying (CS), a solid-state spraying technology, is expected to become an appropriate supplementary for traditional spraying methods owing to its plenty of merits such as high deposition efficiency, low temperature and little influence on the particles/substrate. The most reported researches are bulk alloys fabricated by CS. However, the systematic introduction and cold-sprayed metallic glass coatings have not been summarised. Therefore, in this paper, the international research status of CS including equipment structure, spraying process and parameters, advantages and disadvantages, deposit features and bonding mechanism were introduced. By using this technology, the successful researches about Fe-, Al-, Ni-, Cu- and Zr- based amorphous alloy coatings are reported. To overcome the limitations, further development and solutions were proposed.

Cold Spray Coatings of Complex Concentrated Alloys: Critical Assessment of Milestones, Challenges, and Opportunities

“…To make up for the lapses in the original JC model, a modified JC model is proposed for relatively high strain rates [96][97][98][99][100][101]. This is given in Equations ( 4) and (5) [102,103]. The JC and modified JC models have fewer material constants compared to the typical Preston-Tonk-Wallace (PTW) model.…”

“…The JC and modified JC models have fewer material constants compared to the typical Preston-Tonk-Wallace (PTW) model. These JC models are extensively used for various materials with their constants are easily accessible in the literature [102][103][104][105].…”

“…The ZA model is for estimating plastic deformation behavior of materials, focusing on flow stress at relatively high temperatures [103,105,112]. The flow stress is given by the relation shown in Equation (9).…”

“…They are difficult to deform due to the disordered arrangement of atoms with the low critical resolved shear stresses of Al [120]. A few Al-based BMG coatings have been designed and studied [120,144,145] and their compositions are based on the ternary system (Al-TM-RE), where TM stands for transition metal (Ni, Co, or Fe) and RE stands for rare earth (La, Ce, Gd, or Y) [103]. The transition metals are used to accelerate the atomic packing process, whereas the rare earth elements induce glass formation [103,129,145,[156][157][158].…”

Influence of parameters on the cold spraying FeCoCrMoBCY amorphous coatings

“…Fe-based amorphous alloy powders have high hardness and hard to deform plastically. Therefore, there are few reports on cold-sprayed Fe-based amorphous alloys [9, 34, 35]. Ziemian et al [34] have demonstrated numerical simulation that cold spray parameters are a key factor in the deposition of Fe-based amorphous particles, and TEM found that well-bonded particle interfaces contain oxides.…”