Investigation on the synthesis and the mechanical and thermal expansion properties of ZrMgMo3O12 ceramic bodies

The Synergy Reinforcement Effect of Sm0.85Zn0.15MnO3 and ZrMgMo3O12 on Sm0.85Zn0.15MnO3-ZrMgMo3O12/Al-20Si Composites

“…The ZMMO powder with a nominal size of 0.5–1 μm and the SZMO powder with a nominal size of 1–3 μm were synthesized in the author’s laboratory. The synthesis details of the ZMMO and SZMO reinforcements have been previously reported [ 43 , 44 ].…”

“…Consequently, increasing the amount of ZMMO added to reduce the CTE of ZMMO/2024Al composites becomes challenging due to this issue. Moreover, the flexible orthorhombic frame structure of ZMMO leads to lower hardness (205 HV) and elastic modulus (49.45 GPa) [ 43 ]. As a result, it has limited strengthening effects on the composite and is not conducive to maintaining dimensional stability under stress conditions.…”

Review Study on Mechanical and Thermal Properties of Ceramic Materials for Future Aerospace Applications

“…Advanced ceramics feature low coefficients of thermal expansion, which quantify how much a material expands as its temperature rises. [39] When heat is given to most materials, they expand according to their atomic structure; however, ceramics, due to their atomic composition, may remain stable across a larger temperature range. When compared to metals such as stainless steel, advanced ceramics have half the coefficients of thermal expansion, and this low thermal expansion may be leveraged to advantage in designing assemblies where ceramics can be held under compression to increase mechanical strength.…”

Control of Thermal Expansion in TaVO5 by Double Chemical Substitution

“…29 Such a method is often used in the A 2 M 3 O 12 family. For example, the equivalent indium element can partially replace aluminum to tailor the thermal expansion in Al 2−x In x W 3 O 12 (α l = 1.9−3.9 × 10 −6 K −1 ) 30 or we can use two atoms (ZrMg/HfMg) in the A-site atom such as ZrMgMo 3 O 12 (α l = 0.038 × 10 −6 K −1 ) 31 and In(HfMg) 0.5 Mo 3 O 12 (α l = 0.4 × 10 −6 K −1 ); 32 . 33,34 In the AM 2 O 8 systems, as an example, Sn atoms partially replace the Zr atoms in ZrMo 2 O 8 to change the thermal expansion from negative to positive (Zr 1−x Sn x Mo 2 O 8 , α l = −7.9 to 5.9 × 10 −6 K −1 ), 35 ).…”

“…Such a method is often used in the A 2 M 3 O 12 family. For example, the equivalent indium element can partially replace aluminum to tailor the thermal expansion in Al 2– x In x W 3 O 12 (α l = 1.9–3.9 × 10 –6 K –1 ) or we can use two atoms (ZrMg/HfMg) in the A-site atom such as ZrMgMo 3 O 12 (α l = 0.038 × 10 –6 K –1 ) and In­(HfMg) 0.5 Mo 3 O 12 (α l = 0.4 × 10 –6 K –1 ); both A and B sites can also be replaced by nonequivalent elements to properly adjust the thermal expansion, such as for Zr 0.3 Sc 1.7 Mo 2.7 V 0.3 O 12 (α l = −2.76 × 10 –6 K –1 ), Zr 1+ x Mn 1– x Mo 3–2 x V 2 x O 12 (α l = −3.13 to −2.28 × 10 –6 K –1 ), and Sc x 1 Zr x 2 Hf x 3 Fe x 4 Mo y 1 V y 2 O 12 (α l = −8.57 to −1.05 × 10 –7 K –1 ). , In the AM 2 O 8 systems, as an example, Sn atoms partially replace the Zr atoms in ZrMo 2 O 8 to change the thermal expansion from negative to positive (Zr 1– x Sn x Mo 2 O 8 , α l = −7.9 to 5.9 × 10 –6 K –1 ), but much more difficult task is to tailor the thermal expansion in ZrW 2 O 8 (Zr 1– x M x W 2 O 8– y : M = Sc, In, Y. α l = −8.7 to −7.3 × 10 –6 K –1 ) . Even on replacing the W element by Mo, we get only a reduction of NTE but not a switch to positive (α l changes from about −9 × 10 –6 K –1 of ZrW 2 O 8 to −5 × 10 –6 K –1 of ZrMo 2 O 8 ) .…”