Silicon-Alloy Cooking Surface Coating for Stain-Resistant Cleaning
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Solution Overview
Problem
Cooking surfaces coated with Ti, Zr, and Nb carbides, nitrides, or carbonitrides tend to experience staining issues due to oxidation and reaction with animal fats, which complicates cleaning and affects their appearance.
Innovation Solution
Incorporating silicon into the coating process through carburizing and nitriding steps during the deposition of Zr, Nb, and Ti on a substrate to form (Zr/Nb/Ti)—Si—(N/C) coatings, enhancing chemical inertness, hardness, and adhesion while maintaining ease of cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Ti, Zr, Nb carbides, nitrides, or carbonitrides are deposited on a cooking surface, then the surface becomes easy to clean, but staining occurs due to oxidation and reaction with animal fats
Solution Approach 1:
The patent applies composite materials by combining Ti, Zr, and Nb with Si to form a multi-element coating system. The silicon component specifically addresses oxidation resistance while maintaining the non-stick properties provided by the carbide/nitride structure, thereby reducing staining without compromising ease of cleaning.
Solution Approach 2:
The patent changes the chemical composition parameters of the coating by introducing silicon elements alongside the traditional Ti-Zr-Nb mixture. This compositional parameter change increases oxidation resistance and reduces staining while preserving the desired cleaning properties through optimized elemental ratios.
2Object-affected harmful factors
If Si is added to increase oxidation resistance, then staining is reduced, but the coating composition and production process become more complex
Solution Approach 1:
The patent merges the deposition of multiple elements (Ti, Zr, Nb, and Si) into a single integrated coating process. By combining these elements during one deposition cycle rather than applying separate coatings, the patent reduces production complexity while achieving the desired oxidation resistance and staining prevention.
3Reliability
If multiple elements (Zr, Nb, Ti, Si) are deposited together, then chemical inertness and hardness are improved, but the deposition process requires precise control of multiple parameters
Solution Approach 1:
The patent optimizes specific parameter ranges for the multi-element deposition process, including controlled ratios of Ti:Zr:Nb:Si and precise control of deposition temperature and atmospheric conditions. These parameter specifications ensure consistent chemical inertness and hardness while making the complex process reproducible and controllable.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The addition of silicon significantly reduces staining, increases resistance to oxidation and scratching, and improves adhesion and cleaning ease without compromising the original properties of the cooking surfaces.
Implementation Method 1
the deposits are produced by physical vapor deposition, usually abbreviated PVD
Implementation Method 2
a step of carburizing and/or nitriding of at least one of the elements
Implementation Method 3
a step of carburizing and/or nitriding of at least one of the elements
Implementation Method 4
increasing the resistance of such coatings to oxidation
Data Source
AI summary
Provided is a food-cooking surface for a culinary article or domestic electrical cooking appliance, consisting in depositing Zr and/or Nb and/or Ti on a substrate, the production process including a step of carburizing and/or nitriding at least one of the aforementioned elements, characterized in that the cooking surface also includes depositing Si so as to produce (Zr/Nb/Ti)—Si—(N/C) coatings. Also provided is a culinary article or domestic electrical or gas cooking appliance comprising such a cooking surface.