Mixed metal dodecaborides and uses thereof

Patent metadata

Field	Value
Publication number	US-2019071318-A1
Application number	US-201816122522-A
Country	US
Kind code	A1
Filing date	Sep 5, 2018
Priority date	Sep 5, 2017
Publication date	Mar 7, 2019
Grant date	—

Abstract

Disclosed herein, in certain embodiments, are compounds, methods, tools, and abrasive materials comprising mixed transition metal dodecaborides.

First claim

What is claimed is:

1 . A composite matrix comprising:
Zr 1-x M x B 12 , or Y 1-x Sc x B 12 ;
wherein:
M is yttrium (Y), scandium (Sc), gadolinium (Gd), samarium (Sm), neodymium (Nd), or praseodymium (Pr);
x is from 0.001 to 0.999.

2 . The composite matrix of claim 1 , wherein the composite matrix is resistant to oxidation.

3 . The composite matrix of claim 1 , wherein the composite matrix possesses a density of 4.0 g/cm 3 or less.

4 . The composite matrix of claim 1 , wherein the composite matrix possesses a hardness between 38.0 and 52.0 GPa.

5 . The composite matrix of claim 1 , wherein the composite matrix is crystalline and comprises a unit cell that is cubic or tetragonal as determined by X-ray powder diffraction.

6 . The composite matrix of claim 5 , wherein the unit cell is cubic and the length between two adjacent vertices in the unit cell is a, wherein a is from 7.350 to 7.550 Å.

7 . The composite matrix of claim 5 , wherein the unit cell is tetragonal and comprises two distinct lengths between one vertex and at least two adjacent vertices, wherein the two distinct lengths comprise a first length c and a second length a, wherein c is from 7.350 to 7.550 Å and a is from 5.150 to 5.450 Å.

8 . The composite matrix of claim 1 , wherein the composite matrix is Zr 1-x Y x B 12 .

9 . The composite matrix of claim 1 , wherein the composite matrix is Zr 1-x Sc x B 12 .

10 . The composite matrix of claim 1 , wherein the composite matrix is Y 1-x Sc x B 12 .

11 . The composite matrix of claim 1 , wherein the composite matrix is Zr 1-x Gd x B 12 .

12 . The composite matrix of claim 1 , wherein the composite matrix is Zr 1-x Sm x B 12 .

13 . The composite matrix of claim 1 , wherein the composite matrix is Zr 1-x Nd x B 12 .

14 . The composite matrix of claim 1 , wherein the composite matrix is Zr 1-x Pr x B 12 .

15 . A composite matrix comprising:
A 1-x M x B c ;
wherein:
A is zirconium (Zr), yttrium (Y) or scandium (Sc);
M is yttrium (Y), scandium (Sc), gadolinium (Gd), samarium (Sm), neodymium (Nd), praseodymium (Pr), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), or lutetium (Lu);
x is from 0.001 to 0.999; and
c is 12-20; wherein
if A is Zr and c is 12, M is not Y, Sc, Gd, Sm, Nd, or Pr;
if A is Y and c is 12, M is not Sc;
if A is Sc and c is 12, M is not Y; and
A is not M.

16 . The composite matrix of claim 15 , wherein the composite matrix is Y 1-x Gd x B c , Sc 1-x Gd x B c , Y 1-x Sm x B c , Sc 1-x Sm x B c , Y 1-x Nd x B c , Sc 1-x Nd x B c , Y 1-x Pr x B c , Sc 1-x Pr x B c , Zr 1-x Tb x B c , Y 1-x Tb x B c , Sc 1-x Tb x B c , Zr 1-x Dy x B c , Y 1-x Dy x B c , Sc 1-x Dy x B c , Zr 1-x Ho x B c , Y 1-x Ho x B c , Sc 1-x Ho x B c , Zr 1-x Er x B c , Y 1-x Er x B c , Sc 1-x Er x B c , Zr 1-x Tm x B c , Y 1-x Tm x B c , Sc 1-x Tm x B c , Zr 1-x Yb x B c , Y 1-x Yb x B c , Sc 1-x Yb x B c , Zr 1-x Lu x B c , Y 1-x Lu x B c , or Sci-XLuXB c .

17 . A method of preparing a composite matrix of claim 1 , wherein any of Zr, Y, Sc, Gd, Sm, or Nd and B are homogenized in an agate mortar and pestle or a vortex mixer, pressed under an 8-12 ton load, and arc melted under an argon atmosphere.

18 . A method of preparing a composite matrix of claim 15 , wherein any of Zr, Y, Sc, Gd, Sm, Nd, Pr, Tb, Dy, Ho, Er, Tm, Yb, or Lu and B are homogenized in an agate mortar and pestle or a vortex mixer, pressed under an 8-12 ton load, and arc melted under an argon atmosphere.

19 . A lightweight coating comprising the composite matrix of claim 1 .

20 . A tool comprising a surface or body for cutting or abrading, wherein the surface or body comprises the composite matrix of claim 1 .

Assignees

• Univ California

Inventors

• Kaner Richard Barry
• Akopov Georgiy
• Yeung Michael Tyrone
• Turner Christopher Lawrence
• Sobell Zachary C
• Lin Cheng-Wei

Classifications

• C01P2002/88

  by thermal analysis data, e.g. TGA, DTA, DSC · CPC title

• C01P2006/10

  Solid density · CPC title

• C01G25/006 Primary

  Compounds containing zirconium, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01B35/04 Primary

  Metal borides · CPC title

• C01F17/30

  Compounds containing rare earth metals and at least one element other than a rare earth metal, oxygen or hydrogen, e.g. La4S3Br6 (C01F17/247 - C01F17/294 take precedence) · CPC title