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US 10,994,320 B2Granted
Method for marking workpieces and workpiece
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsChristoph Zeh, Thomas Härtling
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Abstract
In an embodiment, a workpiece includes a hot-formed metal body and a marking, wherein the marking comprises a phosphor and/or pigments which are at least partly arranged on the metal body and which exhibit a reflection behavior and/or a reflectance behavior and/or an albedo behavior deviating from the metal body.
Claims15
A workpiece comprising:
- a hot-formed metal body;
- and
- a marking consisting of an inorganic matrix material that is glass and of phosphor particles and/or ceramic colored particles which are at least partly arranged on the metal body and which are configured to exhibit a reflection behavior and/or a reflectance behavior and/or an albedo behavior deviating from the metal body,
- wherein the matrix material acts as an adhesion promoter and as an adhesive between the metal body and the phosphor particles and/or the ceramic colored particles, and
- wherein the phosphor particles consist of at least one of the following phosphors:
- Eu2+-doped nitrides;
- garnets from the general system (Gd,Lu,Tb,Y)3(Al,Ga,D)5(O,X)12:RE, where X=halide, N or divalent element, D=trivalent or tetravalent element and RE=rare earth metals;
- Eu2+-doped SiONs;
- SiAlONs;
- beta-SiAlONs from the system Si6-xAlzOyN8-y:REZ;
- nitrido-orthosilicates;
- orthosilicates;
- chlorosilicates;
- chlorophosphates;
- BAM phosphors from a BaO-MgO-Al2O3 system;
- halophosphates;
- or (Sr,Ba,Ca)5(PO4)3Cl:Eu2.
14 more elements
A workpiece comprising:
- a hot-formed metal body;
- an anti-scaling protective layer directly on the metal body and composed of aluminum oxide and configured to prevent oxidation of the workpiece in an oxygen-containing atmosphere;
- and
- a marking composed of a decarbonized matrix material and a phosphor which are at least partly arranged on the metal body and which are configured to exhibit a reflection behavior and/or a reflectance behavior and/or an albedo behavior deviating from the metal body,
- wherein the phosphor consists of at least one of the following phosphors:
- (Ca,Sr)AlSiN3:Eu2+;
- Sr(Ca,Sr)Si2Al2N6:Eu2+;
- (Sr,Ca)AlSiN3*Si2N2O:Eu2+;
- (Ca,Ba,Sr)2Si5N8:Eu2+;
- (Sr,Ca)[LiAl3N4]:Eu2+;
- Lu3(Al1-xGax)5O12:Ce3+;
- Y3(Al1-xGax)5O12:Ce:3+;
- (Ca,Sr,Ba)S:Eu2+;
- (Ba,Sr,Ca)Si2O2N2:Eu2+;
- LixMyLnzSi12-(m+n)Al(m+n)OnN16-n;
- Si6-xAlzOyN8-y:REZ;
- AE2-x-nRExEuaSiO4-xNx, AE2-x-nRExEuaSi1-yO4-x-2yNx, where RE=rear earth metal and AE=alkaline earth metal;
- (Ba,Sr,Ca,Mg)2SiO4:Eu2+;
- Ca8Mg(SiO4)4Cl2:Eu2+;
- (Sr,Ba,Ca,Mg)10(PO4)6Cl2:Eu2+;
- BaMgAl10O17:Eu2+;
- M5(PO4)3(Cl,F):(Eu2+, Sb3+, Mn2+);
- or (Sr,Ba,Ca)5(PO4)3Cl:Eu2+, and
- wherein the marking is applied directly to the anti-scaling protective layer.
21 more elements
Dependencies are inferred from the claim text.