Preparation of Integrated Ceramic Armor for Body Bulletproof by Semi-Aqueous Gel-Casting

Abstract

Arc-shaped integrated alumina ceramic armor for body bulletproof with the size of 300 × 250 × 6 mm, R400mm were prepared by semi-aqueous gel-casting. The excellent characters and advantages of the semi-aqueous gel-casting were analyzed; ballistic experiments were carried out to test the protection coefficient of 92%, 96%and 99 alumina ceramics. The experimental results showed that the 92% alumina ceramic and the 99% alumina ceramic had favorable performance while the 96% alumina ceramic had the worst one. But the 92% alumina ceramic had the highest protection coefficient which is 9.96.

Enhanced Mechanical Properties of Al2O3 Nanoceramics via Low Temperature Spark Plasma Sintering of Amorphous Powders

“…Moreover, compared with other ceramic materials, Al 2 O 3 has the advantages of abundant resources, large reserves, and low prices [ 4 , 5 ]. Therefore, Al 2 O 3 ceramics are the most widely employed oxide ceramics in industry, including aerospace, automotive, chemical and medical, metallurgy, nuclear technology, electrochemical devices, optoelectronic and armor protection [ 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. For instance, in the field of armor protection, the high degree of hardness and high strength of Al 2 O 3 ceramics at high strain rates are conducive to resisting the penetration of high-speed armor-piercing ammunition, and the low density is beneficial to the lightweight design of armor protection systems [ 13 ].…”

Study on the effect of Ar/O2 on the performance of ITO film sputtered on the transparent ceramic substrate

“…Bulletproof ceramic [1] windshields for airplanes or high-speed trains generally have a laminated structure with more than four layers of materials with different properties and bonded with multiple films [2]. New requirements for the manufacturing technology of bulletproof windshields are put forward because of the structural changes caused by the bulletproof function.…”

Alumina-based crucibles with enhanced thermal shock resistance via reinforcement of mullite fibers

“…However, under high temperature and vacuum conditions, MgO crucibles generally supply oxygen to the alloy, while CaO crucibles are prone to hydration. In contrast, Al2O3 ceramics have good oxidation resistance, chemical stability, high temperature resistance, and hightemperature strength; moreover, they are abundant in resources and low in price, making them the most widely used oxide ceramics [21][22][23][24][25][26]. At present, commonly used alumina crucibles have poor thermal shock resistance, the surface of the crucible often cracks and falls after once usage, making the continue use impossible.…”