Abstract: A method for manufacturing a metal component using the lost-wax casting method is provided. The component is made of nickel alloy, with a columnar or monocrystalline structure with at least one cavity of elongate shape. The method includes creating a wax model of the component with a ceramic core corresponding to said cavity, the ceramic core comprising a first land for holding at one longitudinal end and a second land for holding at the opposite end, creating a shell mold around the model, the mold comprising a base and the first land of the core being at the same end as the base, placing the mold in a furnace, with the base standing on the sole of the furnace, pouring the said molten alloy into the shell mold, solidifying the poured metal by gradual cooling from the sole in a direction of propagation.

Abstract: The invention relates to a substrate (30) coated on one face (31) with a multilayer of thin films (34) comprising at least one metal functional layer (140) based on silver or made of silver and two antireflective coatings (120, 160), the said antireflective coatings each comprising at least one antireflective layer (124, 164), the said functional layer (140) being disposed between the two antireflective coatings (120, 160), characterized in that the said metal functional layer (140) is a discontinuous layer having a surface area occupation factor in the range between 50% and 98%, or even between 53% and 83%.

Abstract: A light device includes a light engine having light emitting device, an optical device, and at least a first magnetic element disposed between the light emitting device and the optical device. The light device further includes a support holder having a magnetic material adapted to couple to the at least one magnetic element, to magnetically attach the light engine to the support holder.

Abstract: A foundry method of casting monocrystalline metal parts, the method including at least casting a molten alloy into a cavity of a mold through at least one casting channel in the mold, subjecting the alloy to heat treatment, and removing the mold, and wherein the heat treatment is performed before an end of mold removal.

Abstract: The invention relates to a light engine (40) comprising: a light-emitting device (30) comprising at least one light source; an optical device (20) attached to the light-emitting device (30); and at least one first magnetic element (25) between the light-emitting device (30) and the optical device (20). The invention relates also to a light device (10) comprising: said light engine (40); and a support holder (50) arranged to bear the light engine (40), comprising a magnetic material adapted such that the at least one first magnetic element (25) of the light engine (40) and this magnetic material are magnetically attracted one to the other to magnetically attach the light engine (40) to the support holder (50).