Low Temperature Carbon/Boron Nitride Coating for Complex Geometries

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Solution Overview

Problem

Current high-temperature resistant coating methods are expensive, complex, and unsuitable for components with intricate geometries, and existing low-friction coatings pose environmental and health hazards due to toxic chemicals like hexavalent chromium.

Innovation Solution

A low-temperature coating method using a composition of boron nitride, carbon, and aluminum oxide, activated with mechanical energy, which forms a thin film with low friction and high wear resistance, applicable to complex geometries without the need for expensive equipment or hazardous chemicals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If chemical vapor deposition (CVD), physical vapor deposition (PVD) or thermal spray processes are used to form high temperature resistant coating, then high temperature resistance is achieved, but equipment complexity and cost increase

Engineering Contradiction:

Improvehigh temperature resistanceVSAvoidequipment complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The invention changes the temperature parameter from high-temperature processes (CVD, PVD, thermal spray) to low-temperature activation (room temperature or near room temperature). The coating composition uses boron nitride, carbon, and aluminum oxide particles that can be activated at low temperatures through mechanical energy input, eliminating the need for expensive high-temperature equipment while achieving high temperature resistant coatings.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention replaces thermal fields (heat-based CVD, PVD, thermal spray) with mechanical fields (ball milling, vibration, or impact activation). The coating particles are activated through mechanical energy input during application, substituting complex thermal processing equipment with simpler mechanical activation methods while maintaining coating performance.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If chromium-containing coatings are used to reduce friction and provide corrosion resistance, then friction resistance and corrosion resistance are improved, but environmental pollution and health hazards increase

Engineering Contradiction:

Improvecorrosion resistanceVSAvoidenvironmental pollution

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention extracts and eliminates the harmful chromium component from traditional corrosion-resistant coatings. The coating composition uses only environmentally benign materials (boron nitride, carbon, and aluminum oxide particles) that provide equivalent or superior corrosion resistance without the toxic effects of hexavalent chromium, removing the harmful substance while preserving the protective function.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention creates a composite coating material combining boron nitride, carbon, and aluminum oxide particles. This composite provides synergistic effects where each component contributes to corrosion resistance, friction reduction, and environmental safety, replacing the single-component chromium coating with a multi-component green alternative.

Inventive Principle:

Principle #40Composite materials

3Temperature

If conventional coating processes are used, then high temperature resistance is achieved, but applicability to components with complicated geometries is limited

Engineering Contradiction:

Improvehigh temperature resistanceVSAvoidapplicability to complicated geometries

Core Design Contradiction:

TemperatureVSAdaptability or versatility

Solution Approach 1:

The invention creates a universal coating system that can be applied to any substrate geometry through simple mechanical activation methods. The low-temperature activated coating composition can be sprayed, dipped, or brushed onto components of any shape, size, or complexity, making the process universally applicable to firearms, automotive parts, industrial equipment, and other diverse applications while maintaining high temperature resistance.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 coating achieves a coefficient of friction of 0.1 or less and wear resistance exceeding 500 meters, providing high temperature resistance and anti-fouling properties while being environmentally friendly and cost-effective.

Implementation Method 1

The coating composition is activated with mechanical energy to form an activated coating composition

Methodology Applied

Scientific EffectMechanical energy activation:

Data Source

PatentUS11634365B2Low temperature carbon/bn/aluminum oxide coating

Publication Date: 2023.04.25 RICHTER PRECISION INC

AI summary

A method of forming an activated coating composition is disclosed. The method includes providing (a) boron nitride, (b) carbon, (c) aluminum oxide and (d) a liquid carrier. Each of the boron nitride, carbon and aluminum oxide are in particulate form. The coating composition is activated to form an activated coating composition. The activated coating composition includes active components having from about 60.0 wt % to about 90.0 wt % boron nitride, from about 16 wt % to about 24 wt % carbon and from about 4 wt % to about 6 wt % aluminum oxide. A coating method, coated substrate and activated coating composition are also disclosed.