Intermetallic Pigment Layers for Stable Color and Safer Manufacturing

The patent changes the material composition parameters by replacing traditional chromium and nickel with intermetallic compounds containing titanium and nickel in specific ratios (e.g., TiNi, Ti2Ni, TiNi3). This parameter change maintains the desired optical properties while eliminating the environmental harm associated with hexavalent chromium and pure nickel, as these intermetallic compounds are chemically stable and non-harmful to the environment.

The patent employs composite intermetallic compounds as replacement materials. Specifically, it uses compounds like TiNi, Ti2Ni, and TiNi3 which combine titanium and nickel in controlled proportions. These composite materials provide the necessary optical properties for pigments while being chemically stable and environmentally safe, thus resolving the contradiction between performance and environmental safety.

The patent merges the functions of multiple layers into fewer layers by using intermetallic compounds that inherently provide both reflective and absorptive properties. The intermetallic compound layers serve dual purposes: they act as reflector layers while also providing magnetic properties for the absorber layer, thereby reducing the total number of layers from seven to five while maintaining optical performance.

The intermetallic compounds used in the patent exhibit multi-functionality, serving as both reflector and absorber materials. For example, the TiNi and Ti2Ni compounds provide magnetic properties for absorption while also contributing to reflectance, allowing a single layer to perform functions that traditionally required separate layers, thus reducing manufacturing complexity and cost.

The patent converts the potential harm of nickel into a benefit by combining it with titanium in specific ratios to form intermetallic compounds. While nickel alone is harmful, when combined with titanium in compounds like TiNi and Ti2Ni, the material becomes chemically stable and environmentally safe, thus converting a harmful material into a beneficial one.

The patent replaces expensive and hazardous chromium and nickel materials with more economical and safe intermetallic compounds. The TiNi, Ti2Ni, and TiNi3 compounds are cheaper to manufacture, safer to handle, and easier to dispose of, while maintaining the required chemical stability and optical properties of the pigment.