TiC-Zr-Si Composite Particles Oxidation Resistance
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Solution Overview
Problem
Existing carbide fine particles lack excellent oxidation resistance, which limits their range of applications and additional functional requirements.
Innovation Solution
Composite particles are produced by combining TiC with at least one of Zr and Si, using a gas-phase process such as thermal plasma, with preferred mass content ranges of 0.1 to 20% for Zr and Si individually, or 0.1 to 10% each when combined.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional carbide fine particles are used, then production is simple and cost-effective, but oxidation resistance is poor
Solution Approach 1:
The patent applies composite materials by combining TiC with Zr and/or Si to create composite particles with enhanced oxidation resistance. The composite structure allows the base TiC to maintain its functional properties while the added elements provide oxidation protection, directly resolving the contradiction between simple composition and oxidation resistance.
2Reliability
If TiC is combined with Zr and Si, then oxidation resistance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies precise parameter ranges (Zr: 0.1-20 mass%, Si: 0.1-20 mass%, with combined content each 0.1-10 mass%) to optimize oxidation resistance while managing manufacturing complexity. By defining these specific parameter windows, the invention balances performance improvement with practical manufacturability, addressing the contradiction between oxidation resistance and manufacturing precision requirements.
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 resulting composite particles exhibit excellent oxidation resistance, maintaining their properties and functionality even after baking at elevated temperatures, thus expanding their application potential.
Implementation Method 1
a step of converting a slurry, in which the feedstock is dispersed in a liquid, into droplets and supplying the droplets into a thermal plasma flame
Implementation Method 2
the thermal plasma flame; and a step of supplying cooling gas to a terminating portion of the thermal plasma flame to thereby produce the composite particles
Implementation Method 3
a step of supplying cooling gas to a terminating portion of the thermal plasma flame to thereby produce the composite particles
Data Source
AI summary
Provided are: composite particles having excellent oxidation resistance; and a method for producing composite particles. The composite particles are obtained by forming a composite of TiC and at least one of Zr and Si. In the method for producing composite particles, a titanium oxide powder and at least one of a zirconium oxide powder and a silicon oxide powder are used as raw material powders, and composite particles are produced using a gas phase method.