1、ZrNZrCZrB2MAAl2O3Crstal systemCubicCubicHexagonalCubicHexagonalLattice constants(nm)0.456400.46930a=0.3，c=0.35300.8083a=0.4759，c=1.299Melting point()32553530324521352053Density(g/cm3)6.796.316.093.583.99Factor of expension106/-5.96.6140Mohs hardness8-9-Micro-hardness3200251022501400-17001900-2200Fra

2、cture Toughness(Mpa*m1/2)2.82.6-33.00204060AAAAmmAmmmAmAAmmmAmmmmmmmmAAmmmmmmmmmmAmmmmmm10009008002 /（o）B2O3;mm-ZrO2;AAl2O3;Al;ZrB20204060OAAOAmAOOOAmmAAAmOmmmAmm1600150014001300120011002 （O）9Al2O32B2O3;mm-ZrO2;ZrB2;AAl2O3;O-ZrC 在埋炭條件下，ZrB2可能與O2、CO、N2發生如下反應: 2ZrB2(s)+5O2(g)=2ZrO2(s)+2B2O3(l) (1-2)在1

3、600時氧分壓為3.3510-12。反應2-2的反應自由能：GR=GR0+RTlnKp=366.35KJ/mol0 ZrB2(s)+3CO(g)=ZrC(s)+B2O3(l)+2C(s) (2-3)GR=GR0+RTlnKp=0.44T-770.6 (KJ/mol)反應式2-3的平衡溫度為1752K。高于此溫度時，反應不會發生。2ZrB2(s)+N2(g)=2ZrN(s)+4B(l) (2-4)GR=GR0+RTlnKp=0.1373T-66.086 (KJ/mol)反應式2-4的平衡溫度為482.38K。高于此溫度時，反應同樣不會發生。Al2O3 in the sample treated

4、at 1400 ZrB2 in the sample treated at 1400 020406080100N-10N-8N-6N-4N-2N-0Two ThetaASSAASASASASSS,tt,ctSc,tSSt,cS鋁的外加0、2%、4%、6%、8%、10%的試樣分別稱N-0、N-2、N-4、N-6、N-8、N-10S-MgAl204; -ZrN; -ZrAl3O3N; t-t-ZrO2; c-c-ZrO2; A-Al2O3 SEM micrograph of sample N-2(white substance is ZrN) SEM micrograph of sample N-

5、2 (gray substance is ZrAl3O3N) 0204060801002200Mpa150Mpa100Mpa50MpaAAAAAMgAl2O4; AAl2O3; ZrN;- ZrAl3O3N 0200400600800100012001400-0.12-0.10-0.08-0.06-0.04-0.020.000.02DTGDTA1437.61010.3801.1667.2DTATemperature/0200400600800100012001400-0.050.000.050.100.150.200.250.300.35DTG0200400600800100012001400

6、-0.12-0.10-0.08-0.06-0.04-0.020.000.020.040.060.08DTGDTA1372.21350.711131012.7857668378DTATemperature/-0.10.00.10.20.30.4DTGDTG and DTA patterns of Al-ZrO2-2%Al mixtures in N2 gas DTG and DTA patterns of Al-ZrO2-3%MgO-10%Al mixtures in N2 gas 4AlN(s)+3ZrO2(s) =3ZrN(s)+2Al2O3(s)+1/2N2 (g) (3-4)4AlN(s)+2MgO(s)+3Z