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Applications in Manufacturing
Published in Nirupam Chakraborti, Data-Driven Evolutionary Modeling in Materials Technology, 2023
We will now focus on an emerging material: ALON (aluminium oxynitride), a ceramic spinel which shows a rare combination of very high hardness along with excellent optical transparency, which is further aided by its excellent strength to weight ratio, as it is far superior to most glasses or polycarbonates that are currently being used. ALON has a huge potential of applications both in civilian and defence sectors. One can envisage ALON as an excellent candidate for fabricating supermarket scanner windows, scratchproof lenses, watch crystals, and so on, along with as a potential material for the transparent armour manufacture, which would be useful to the Army. However, large scale application of ALON is still limited by its huge fabrication cost.
Metal Manufacturing Processes and Energy Systems
Published in Swapan Kumar Dutta, Jitendra Saxena, Binoy Krishna Choudhury, Energy Efficiency and Conservation in Metal Industries, 2023
Swapan Kumar Dutta, Binoy Krishna Choudhury
Aluminum and its alloys, as in the case of iron, are of two types—wrought and cast categories, depending on production method. A product of aluminum, aluminum oxynitride (commercially named as ALON), produced in a chemical process, is the hardest known polycrystalline ceramic, recently developed as transparent sheet for many special uses including armor in defense, cockpits of aircraft, roofs of buildings (Figure 4.2), etc. Rolling, extruding, drawing, forging and a number of other more specialized processes belong to the wrought category. More than 200 aluminum and 400 aluminum-alloy types have been registered.
Advanced materials science
Published in Paul Marsden, Digital Quality Management in Construction, 2019
While ‘transparent aluminium’ was discussed in 1930s Germany, through to existing in the future in Star Trek, it is not metal at all, but a ceramic called aluminium oxynitride, comprising aluminium, oxygen, and nitrogen, known by the chemical formula AlON. It is incredibly tough and in tests 1.6 inches of AlON have performed better in ballistic tests firing a fifty calibre rifle round at it, than 3.7 inches of so-called bulletproof glass.15 Practically speaking, while it is expensive in comparison to current materials, it has much higher resistance properties to scratches and breakages for windows.
Analysis of fracturing characteristics of unconfined rock plate under edge-on impact loading
Published in European Journal of Environmental and Civil Engineering, 2020
Yixian Wang, Hang Lin, Yanlin Zhao, Xian Li, Panpan Guo, Yan Liu
In the literature, studies on the crack propagation process in heterogeneous materials under impact loading were mainly based on laboratory tests. Among these laboratory tests, edge-on impact test is capable of capturing the fracturing behaviour of specimens before and after reaching failure state. Meanwhile, edge-on impact test has an advantage which is flexible impact mode. A flexible impact mode means that projectile form, impact angle and impact energy are controllable. The dynamic contact between projectile and specimen is a transient process. If this transient process is to be captured using ultrahigh-speed photography, the fracture propagation trace in the specimen will be derived. The derived fracture propagation trace serves as a well-accepted indication of the real evolution characteristics of fracture (Strassburger, 2004). Edge-on impact test was first applied by Strassburger et al. (1994) to the study of fracture in three types of ceramics. Recently, applications of edge-on impact test were extended to the study of crack propagation process in heterogeneous materials such as limestone, granite, silicon carbide and aluminium oxynitride (Grange et al., 2008; Leavy et al., 2013; Shah & Hamdani, 2013). However, because of the material heterogeneity and the difficulty in tackling the issue of the dynamic contact, studies on the impact contact response of heterogeneous materials are often conducted by comparing laboratory testing results with numerical simulation results.