The experimental evaluation results of the response of sapphire crystal to shock load,

The experimental evaluation results of the response of sapphire crystal to shock load,

The systematic study of the response of sapphire to pulsed loading began several years ago. Sapphire products may be subjected to pulsed loading in many applications, such as protective windows for environmental detectors, space applications, etc. Among randomly selected samples The individual data obtained are diverse in results, but a comparative analysis of the chemical properties of different glasses and ceramics used as protective materials (Table 2.11) shows that sapphire outperforms all known transparent materials and is comparable to those used for bullet and artillery fragmentation protection. Ceramic materials are comparable.

Presented below are the results of an experimental examination of the response of sapphire to shock loading, taking into account the sample history, including their structural integrity (depending on the growth method) and prior chemical-mechanical or thermal treatment. It was made to establish the material behavior with itself Attempts at the relationship between grain structure. Shock load values were chosen based on the actual requirement that the sapphire screen and window be subjected to a 6-8J energy shock. These studies were carried out on a sapphire cylinder with a diameter of 75mm and a wall thickness of 4.6mm, And the cylinder is placed on a 78×78×46 plate, the cylinder is made of crystals grown by HDS, Kyropoulos and Stepanov methods. C, A and R surface polishing zhi120/100, 60/40 and 40/20. These tests are in Consistent with standard requirements for shock energies varying from 4 to 10J (Figure 2.59).

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