Molybdenum-Rhenium Medical Alloys for Cyclic Load Durability
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Solution Overview
Problem
Medical devices made from traditional materials like stainless steel and cobalt-chromium alloys often lack improved properties such as strength, durability, and biostability, which are essential for applications involving cyclic loading and biocompatibility.
Innovation Solution
A novel molybdenum and rhenium metal alloy is developed, which can be combined with carbon nanotubes to enhance fatigue life, strength, and biocompatibility, allowing for the creation of medical devices with improved physical properties without increasing bulk or weight, and can be used in various medical applications including dental and orthopedic implants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional stainless steel or cobalt-chromium alloys are used, then the medical device has adequate structural integrity, but the strength, durability, and biostability are insufficient for cyclic loading applications
Solution Approach 1:
The patent employs composite materials by combining molybdenum and rhenium metals to form an alloy with enhanced properties. This composite approach allows the material to simultaneously achieve superior strength, durability, and biostability required for cyclic loading applications, overcoming the limitations of traditional single-phase alloys like stainless steel or cobalt-chromium
2Weight of moving object
If the bulk and volume of the medical device are reduced, then the device becomes smaller and lighter, but the strength and radial strength may be compromised
Solution Approach 1:
The patent utilizes parameter changes by modifying the material composition parameters—specifically the ratio and concentrations of molybdenum and rhenium metals. This allows the alloy to achieve enhanced strength-to-weight ratio, enabling the device to be made smaller and lighter while maintaining or improving radial strength through optimized material properties rather than increased bulk
3Volume of moving object
If the bulk and volume of the medical device are reduced, then the device becomes more compact, but the durability and resistance to fatigue failure may be reduced
Solution Approach 1:
The molybdenum-rhenium composite alloy provides improved fatigue resistance and durability even in reduced volumes. The synergistic combination of these two metals creates a material structure that resists cyclic loading and fatigue failure more effectively than traditional alloys, allowing compact device design without sacrificing longevity
4Stress or pressure
If traditional materials are used, then the manufacturing process is well-established, but the coefficient of friction and wear resistance are insufficient
Solution Approach 1:
The patent applies parameter changes by adjusting the alloy composition parameters of molybdenum and rhenium to optimize surface properties. This results in improved coefficient of friction and wear resistance while maintaining manufacturability through established metalworking processes, balancing performance enhancement with manufacturing feasibility
Data Source
AI summary
A medical device and a method and process for at least partially forming a medical device, which medical device has improved physical properties.