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Analysis of a Functionally Graded Interface Between a Novel Titanium Carbide Surface and Titanium Alloy Substrate.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Analysis of a Functionally Graded Interface Between a Novel Titanium Carbide Surface and Titanium Alloy Substrate./
Author:	Seay, Nathanael.
Description:	1 online resource (225 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
Contained By:	Dissertations Abstracts International85-01B.
Subject:	Mechanical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9798379785185

Analysis of a Functionally Graded Interface Between a Novel Titanium Carbide Surface and Titanium Alloy Substrate.
Seay, Nathanael.

Analysis of a Functionally Graded Interface Between a Novel Titanium Carbide Surface and Titanium Alloy Substrate. - 1 online resource (225 pages)

Source: Dissertations Abstracts International, Volume: 85-01, Section: B.

Thesis (Ph.D.)--University of Maryland, Baltimore County, 2023.

Includes bibliographical references

Osteoarthritis (OA) is a painful and frequently debilitating affliction affecting millions of adults in the United States alone. Historically, treatments for OA focused on relieving symptoms through the employment of drug therapies. However, when drugs are no longer effective, then joint replacement, full or partial, is employed.Despite the success of joint replacements, wear of the bearing surface is of concern. Wear can disrupt the normal mechanical function of the implant and cause numerous problems in the body. Particles can cause allergic reactions, pseudotumors, bone resorption, and aseptic loosening of the implant. Fabrication techniques to make the surface of candidate biomaterials resilient to abrasion and wear continue to be developed.The purpose of this research was to explore a method to determine for improving the lifespan of artificial joints. A novel micro-textured surface was created through plasma enhanced chemical vapor deposition (CVD) on a Ti6Al4V substrate. The interface between the novel titanium carbide surface and substrate was studied to determine its properties relevan to tribological applications.The surface consists of crystalline channels with nanocrystalline features. X-ray diffraction (XRD) patterns indicated that the film was composed of titanium carbide (TiC). Mechanical testing indicated that the film is at least 22% harder than the as received material. Grid based indentation and atomic force microscopy (AFM) fast force mapping indicate that there is an integration zone where mechanical properties vary gradually between substrate and thin film. These results were then used to create a molecular dynamics (MD) model and a finite element model (FEM) to evaluate the potential adhesive properties of the novel surface. The MD model showed that "mixed interface" specimens have greater adhesion than laminate films. The FEM study indicated that functionally gradient specimens resist crack propagation more than homogenous specimens. These results indicate that the novel surface could improve the life span of artificial joints.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798379785185Subjects--Topical Terms:

557493
Mechanical engineering.
Subjects--Index Terms:

Thin filmsIndex Terms--Genre/Form:

554714
Electronic books.

Analysis of a Functionally Graded Interface Between a Novel Titanium Carbide Surface and Titanium Alloy Substrate.
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520 $a Osteoarthritis (OA) is a painful and frequently debilitating affliction affecting millions of adults in the United States alone. Historically, treatments for OA focused on relieving symptoms through the employment of drug therapies. However, when drugs are no longer effective, then joint replacement, full or partial, is employed.Despite the success of joint replacements, wear of the bearing surface is of concern. Wear can disrupt the normal mechanical function of the implant and cause numerous problems in the body. Particles can cause allergic reactions, pseudotumors, bone resorption, and aseptic loosening of the implant. Fabrication techniques to make the surface of candidate biomaterials resilient to abrasion and wear continue to be developed.The purpose of this research was to explore a method to determine for improving the lifespan of artificial joints. A novel micro-textured surface was created through plasma enhanced chemical vapor deposition (CVD) on a Ti6Al4V substrate. The interface between the novel titanium carbide surface and substrate was studied to determine its properties relevan to tribological applications.The surface consists of crystalline channels with nanocrystalline features. X-ray diffraction (XRD) patterns indicated that the film was composed of titanium carbide (TiC). Mechanical testing indicated that the film is at least 22% harder than the as received material. Grid based indentation and atomic force microscopy (AFM) fast force mapping indicate that there is an integration zone where mechanical properties vary gradually between substrate and thin film. These results were then used to create a molecular dynamics (MD) model and a finite element model (FEM) to evaluate the potential adhesive properties of the novel surface. The MD model showed that "mixed interface" specimens have greater adhesion than laminate films. The FEM study indicated that functionally gradient specimens resist crack propagation more than homogenous specimens. These results indicate that the novel surface could improve the life span of artificial joints.
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