Abstract
1. It has been shown that Relit coatings of high particle microhardness can in principle be produced by the technique of atmospheric spray-deposition. 2. Spray-deposited Relit consists of disk-shaped and globular particles having a complex microstructure. Their open porosity is 7–11%, while their density is 13.5–14.0 g/cm3. 3. The microhardness of spray-deposited Relit is strongly affected by the powder particle size. When Relit powder of 45–150-μ particle size is used, the resulting microhardness lies in the range 650–2400 kg/mm2. 4. The bonds between the particles in spray-deposited Relit are comparatively weak. The bend strength of the material is 5–10 kg/mm2, while its Vickers hardness is 100–250 kg/mm2. 5. To produce wear-resistant surfaces capable of withstanding high specific loads, spray-deposited coatings must be subjected to some additional treatment such as solder consolidation or sintering.
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