Diamond Nanoparticle Metal Matrix Composite Coatings

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Solution Overview

Problem

Existing coatings for equipment in wear-intensive or corrosive environments, such as those used in pumps and wellbore equipment, often fail at elevated temperatures or under high loads, and lack optimal mechanical properties like strength-to-weight ratio.

Innovation Solution

A method involving the dispersion of functionalized diamond nanoparticles in a fluid with metal ions to form a deposition composition, followed by electrochemical deposition to create a metal matrix composite coating that includes the nanoparticles and a metal formed from the ions, providing enhanced mechanical and barrier properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If traditional metal coatings are used to improve wear resistance and protection, then the coating provides durability and protective properties, but the coating has high weight and lacks optimal strength-to-weight ratio

Engineering Contradiction:

Improvestrength-to-weight ratioVSAvoidcoating weight

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The patent applies composite materials by combining diamond nanoparticles with metal matrix (nickel, copper, or zinc) to create a coating that leverages the high strength and low density of diamond while maintaining the ductility and adhesion properties of the metal matrix. This composite structure achieves superior strength-to-weight ratio compared to traditional solid metal coatings.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the physical and chemical parameters of the coating by incorporating nanoscale diamond particles (1-100 nm) into the metal matrix, fundamentally altering the material's density, strength, and mechanical properties. The electrochemical deposition process also enables precise control over coating composition and structure.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If hard coatings are applied to improve wear characteristics, then the coating enhances durability, but the coating fails at elevated temperatures or under high load

Engineering Contradiction:

Improvecoating durabilityVSAvoidelevated temperature resistance

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The diamond-metal composite structure provides thermal stability because diamond has exceptional thermal conductivity and high temperature stability, while the metal matrix maintains structural integrity under load. This combination allows the coating to withstand both high temperatures and mechanical stress that would cause failure in conventional coatings.

Inventive Principle:

Principle #40Composite materials

3Object-affected harmful factors

If polymer coatings are used to protect from corrosion, then the coating provides corrosion resistance, but the coating fails at elevated temperatures or under high load

Engineering Contradiction:

Improvecorrosion protectionVSAvoidmechanical strength under load

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The patent replaces polymer-based corrosion protection with a metal matrix composite that provides both corrosion resistance and mechanical strength. The metal matrix (nickel, copper, or zinc) inherently resists corrosion while maintaining structural integrity under load, eliminating the weakness of polymer coatings at elevated temperatures and high stress.

Inventive Principle:

Principle #40Composite materials

4Stability of the object's composition

If electrochemical deposition is used to form the coating, then the coating achieves uniform distribution of diamond nanoparticles and metal, but the process requires precise control of deposition parameters

Engineering Contradiction:

Improvecoating composition uniformityVSAvoiddeposition process complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The electrochemical deposition process utilizes controlled electrochemical parameters (voltage, current density, pH, temperature) to precisely control the reduction of metal ions and the simultaneous incorporation of diamond nanoparticles. This parameter control enables uniform nanoparticle distribution while managing process complexity through systematic optimization.

Inventive Principle:

Principle #35Parameter changes

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 coating is lightweight, strong, and exhibits reduced friction, improved barrier properties, and configurable microstructure, offering superior performance compared to traditional metal coatings.

Implementation Method 1

electrochemically depositing a coating over the substrate. The coating comprises the diamond nanoparticles and a metal formed by reduction of the metal ions in the deposition composition

Methodology Applied

Scientific EffectElectrochemical deposition: Electrodeposition

Implementation Method 2

a metal formed by reduction of the metal ions in the deposition composition

Methodology Applied

Scientific EffectReduction: Reduction

Data Source

PatentUS10669635B2Methods of coating substrates with composite coatings of diamond nanoparticles and metal

Publication Date: 2020.06.02 BAKER HUGHES CO

AI summary

A method of coating a substrate includes dispersing functionalized diamond nanoparticles in a fluid comprising metal ions to form a deposition composition; disposing a portion of the deposition composition over at least a portion of a substrate; and electrochemically depositing a coating over the substrate. The coating comprises the diamond nanoparticles and a metal formed by reduction of the metal ions in the deposition composition.